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Area Code 312999 - CHICAGO - - CYGNUS TELECOMMUNICATIONS CORPORATION - IL
Area Code 312998 - CHICAGO - Cellphone -
Area Code 312997 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312996 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312994 - CHICAGO - Landline - OVATION COMMUNICATIONS OF ILLINOIS, INC.
Area Code 312993 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312992 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312991 - BUFFALO GROVE - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312990 - CLARENDON HILLS - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312988 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312987 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312986 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312985 - CHICAGO - Landline - OVATION COMMUNICATIONS OF ILLINOIS, INC.
Area Code 312984 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312983 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312982 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312981 - CHICAGO - Landline - OVATION COMMUNICATIONS OF ILLINOIS, INC.
Area Code 312980 - CHICAGO - Landline - TELEPORT COMMUNICATIONS GROUP - CHICAGO
Area Code 312977 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312979 - CHICAGO - Cellphone - SBC ATT ILLINOIS
Area Code 312974 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312972 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312971 - CHICAGO - Cellphone -
Area Code 312970 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312969 - WESTERN SPRINGS - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312968 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312965 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312964 - CHICAGO - Cellphone -
Area Code 312963 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312962 - CHICAGO - Landline - GLOBAL CROSSING LOCAL SERVICES, INC.-IL
Area Code 312961 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312957 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312960 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312956 - DEERFIELD - Cellphone -
Area Code 312955 - CHICAGO - Landline - RCN TELECOM SERVICES OF ILLINOIS, INC. - IL
Area Code 312954 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312953 - ARLINGTON HEIGHTS - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312952 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312951 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312949 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312948 - CHICAGO - Landline - OVATION COMMUNICATIONS OF ILLINOIS, INC.
Area Code 312947 - CHICAGO - - SBC ATT ILLINOIS
Area Code 312946 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312945 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312944 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312942 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312943 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312941 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312940 - CHICAGO - Cellphone -
Area Code 312939 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312937 - CHICAGO - Cellphone -
Area Code 312938 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312936 - CHICAGO - Cellphone - SBC ATT ILLINOIS
Area Code 312935 - BENSENVILLE - Landline - SBC ATT ILLINOIS
Area Code 312934 - DEERFIELD - Cellphone -
Area Code 312933 - CHICAGO - Cellphone - SPRINT SPECTRUM L.P.
Area Code 312932 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312931 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312930 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312929 - CHICAGO - - T-MOBILE USA, INC.
Area Code 312928 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312927 - CHICAGO - Cellphone - T-MOBILE USA, INC.
Area Code 312926 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312925 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312924 - CHICAGO - Landline - PAETEC COMMUNICATIONS, INC. - IL
Area Code 312923 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312921 - CHICAGO - - SBC ATT ILLINOIS
Area Code 312922 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312920 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312919 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312917 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312916 - CHICAGO - Cellphone - AMERICAN MESSAGING (AM), INC.
Area Code 312915 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312914 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312913 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312912 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312910 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312909 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312908 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312907 - CHICAGO - Cellphone - NEXTEL COMMUNICATIONS, INC.
Area Code 312906 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312905 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312904 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312903 - CHICAGO - Cellphone - AMERICAN MESSAGING (AM), INC.
Area Code 312902 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312901 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312899 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312898 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312897 - CHICAGO - Cellphone -
Area Code 312896 - CHICAGO - Landline - BROADWING COMMUNICATIONS, LLC - IL
Area Code 312895 - CHICAGO - Landline - BROADWING COMMUNICATIONS, LLC - IL
Area Code 312894 - CHICAGO - Landline - MCIMETRO ACCESS TRANSMISSION SERVICES LLC
Area Code 312893 - CHICAGO - Landline - BROADWING COMMUNICATIONS, LLC - IL
Area Code 312892 - CHICAGO - Landline - BROADWING COMMUNICATIONS, LLC - IL
Area Code 312891 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312888 - CHICAGO - - GECKOTECH, LLC - IL
Area Code 312890 - CHICAGO - Cellphone - SPRINT SPECTRUM L.P.
Area Code 312887 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312886 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312884 - CHICAGO - Landline - OVATION COMMUNICATIONS OF ILLINOIS, INC.
Area Code 312882 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312881 - CHICAGO - Landline - OVATION COMMUNICATIONS OF ILLINOIS, INC.
Area Code 312880 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312879 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312878 - CHICAGO - - PEERLESS NETWORK OF ILLINOIS, LLC - IL
Area Code 312877 - CHICAGO - Cellphone -
Area Code 312876 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312875 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312873 - CHICAGO - Landline - MCI WORLDCOM COMMUNICATIONS, INC. - IL
Area Code 312870 - CHICAGO - Landline - GLOBALCOM, INC.-IL
Area Code 312869 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312867 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312865 - BUFFALO GROVE - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312864 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312863 - CHICAGO - Landline - OVATION COMMUNICATIONS OF ILLINOIS, INC.
Area Code 312862 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312861 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312860 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312859 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312858 - - -
Area Code 312857 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312856 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312855 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312854 - CHICAGO - Landline - RCN TELECOM SERVICES OF ILLINOIS, INC. - IL
Area Code 312853 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312852 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312851 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312850 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312849 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312848 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312846 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312845 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312844 - CLARENDON HILLS - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312842 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312841 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312840 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312839 - CHICAGO - Cellphone - AMERICAN MESSAGING (AM), INC.
Area Code 312837 - GLENVIEW - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312836 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312835 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312834 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312833 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312832 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312831 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312830 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312829 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312828 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312827 - EVANSTON - Landline - SBC ATT ILLINOIS
Area Code 312826 - CHICAGO - Cellphone -
Area Code 312824 - VILLA PARK - Cellphone -
Area Code 312825 - CHICAGO - Cellphone -
Area Code 312823 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312822 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312821 - CHICAGO - Landline - MCI WORLDCOM COMMUNICATIONS, INC. - IL
Area Code 312820 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312819 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312818 - CHICAGO - Cellphone -
Area Code 312817 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312816 - CLARENDON HILLS - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312814 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312813 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312812 - CHICAGO - Cellphone - SBC ATT ILLINOIS
Area Code 312810 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312808 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312807 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312806 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312805 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312804 - CHICAGO - Cellphone - T-MOBILE USA, INC.
Area Code 312803 - CHICAGO - Landline - MCI WORLDCOM COMMUNICATIONS, INC. - IL
Area Code 312802 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312801 - CHICAGO - Cellphone -
Area Code 312799 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312798 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312797 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312796 - CHICAGO - Landline -
Area Code 312795 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312794 - CHICAGO - Landline - RCN TELECOM SERVICES OF ILLINOIS, INC. - IL
Area Code 312793 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312791 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312790 - CHICAGO - Cellphone - SBC ATT ILLINOIS
Area Code 312789 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312788 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312787 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312785 - - -
Area Code 312786 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312784 - CHICAGO - - GLOBALCOM, INC.-IL
Area Code 312782 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312781 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312780 - CHICAGO - Landline - MCI WORLDCOM COMMUNICATIONS, INC. - IL
Area Code 312777 - CHICAGO - Landline - TELEPORT COMMUNICATIONS GROUP - CHICAGO
Area Code 312775 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312772 - CHICAGO - - DENALI SPECTRUM LICENSE, LLC
Area Code 312771 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312770 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312769 - CHICAGO - Cellphone - INDIANA PAGING NTWK
Area Code 312766 - CHICAGO - Cellphone -
Area Code 312768 - CHICAGO - Landline - AT&T LOCAL
Area Code 312765 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312762 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312760 - CHICAGO - Cellphone - AMERICAN MESSAGING (AM), INC.
Area Code 312759 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312758 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312756 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312755 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312753 - CHICAGO - Landline - RCN TELECOM SERVICES OF ILLINOIS, INC. - IL
Area Code 312752 - CHICAGO - Landline - BROADWING COMMUNICATIONS, LLC - IL
Area Code 312751 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312750 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312749 - ALGONQUIN - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312748 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312747 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312746 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312745 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312744 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312743 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312742 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312740 - CHICAGO - Cellphone - AMERICAN MESSAGING (AM), INC.
Area Code 312739 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312738 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312737 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312735 - CHICAGO - Cellphone - NEXTEL COMMUNICATIONS, INC.
Area Code 312733 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312732 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312731 - CHICAGO - Landline - T-MOBILE USA, INC.
Area Code 312730 - CHICAGO - Landline - AT&T LOCAL
Area Code 312729 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312727 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312726 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312725 - CHICAGO - - BANDWIDTH.COM CLEC, LLC - IL
Area Code 312724 - CHICAGO - Cellphone -
Area Code 312720 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312719 - CHICAGO - Cellphone - UNITED STATES CELLULAR CORP. - ILLINOIS
Area Code 312718 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312717 - WESTERN SPRINGS - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312716 - CHICAGO - Cellphone - SBC ATT ILLINOIS
Area Code 312715 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312714 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312713 - CHICAGO - Cellphone - AMERICAN MESSAGING (AM), INC.
Area Code 312712 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312709 - CHICAGO - Cellphone -
Area Code 312710 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312707 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312706 - CHICAGO - Landline - TELEPORT COMMUNICATIONS GROUP - CHICAGO
Area Code 312705 - CHICAGO - Landline - TELEPORT COMMUNICATIONS GROUP - CHICAGO
Area Code 312704 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312703 - CHICAGO - Cellphone - SBC ATT ILLINOIS
Area Code 312701 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312699 - CLARENDON HILLS - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312698 - CHICAGO - Landline - BROADWING COMMUNICATIONS, LLC - IL
Area Code 312697 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312696 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312695 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312694 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312693 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312692 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312690 - CHICAGO - Cellphone -
Area Code 312691 - CHICAGO - Cellphone - INDIANA PAGING NTWK
Area Code 312689 - CHICAGO - Cellphone - AMERICAN MESSAGING (AM), INC.
Area Code 312688 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312683 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312685 - CHICAGO - Cellphone - UNITED STATES CELLULAR CORP. - ILLINOIS
Area Code 312682 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312681 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312680 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312679 - CHICAGO - Cellphone - AMERICAN MESSAGING (AM), INC.
Area Code 312678 - CHICAGO - Cellphone -
Area Code 312677 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312676 - CHICAGO - - GLOBALCOM, INC.-IL
Area Code 312675 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312674 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312673 - CHICAGO - Landline - GLOBALCOM, INC.-IL
Area Code 312672 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312671 - CHICAGO - Cellphone - UNITED STATES CELLULAR CORP. - ILLINOIS
Area Code 312670 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312666 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312669 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312665 - CHICAGO - Landline - TELEPORT COMMUNICATIONS GROUP - CHICAGO
Area Code 312664 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312663 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312662 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312661 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312660 - INDIANAPOLIS - Landline - TELEPORT COMMUNICATIONS GROUP - CHICAGO
Area Code 312659 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312658 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312657 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312656 - LOMBARD - Cellphone - NEXTEL COMMUNICATIONS, INC.
Area Code 312655 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312654 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312653 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312652 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312651 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312650 - CHICAGO - Landline - RCN TELECOM SERVICES OF ILLINOIS, INC. - IL
Area Code 312648 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312649 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312647 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312646 - CHICAGO - - BROADWING COMMUNICATIONS, LLC - IL
Area Code 312645 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312644 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312643 - CHICAGO - Landline - RCN TELECOM SERVICES OF ILLINOIS, INC. - IL
Area Code 312642 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312641 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312640 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312639 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312638 - CHICAGO - Landline - BROADWING COMMUNICATIONS, LLC - IL
Area Code 312637 - OAK PARK - Landline - BROADWING COMMUNICATIONS, LLC - IL
Area Code 312636 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312635 - CHICAGO - Landline - GLOBAL CROSSING LOCAL SERVICES, INC.-IL
Area Code 312634 - BARRINGTON - Landline - SBC ATT ILLINOIS
Area Code 312633 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312632 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312629 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312630 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312628 - CHICAGO - Landline - XO ILLINOIS, INC.
Area Code 312627 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312626 - CHICAGO - - INFOTELECOM, LLC - IL
Area Code 312625 - CHICAGO - Landline - GLOBAL NAPS, INC. - IL
Area Code 312624 - CHICAGO - Landline - RCN TELECOM SERVICES OF ILLINOIS, INC. - IL
Area Code 312623 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312622 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312621 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312619 - CHICAGO - Cellphone -
Area Code 312618 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312617 - CHICAGO - Cellphone - NEXTEL COMMUNICATIONS, INC.
Area Code 312616 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312615 - BUFFALO GROVE - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312614 - CHICAGO - Cellphone -
Area Code 312613 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312610 - CHICAGO - Cellphone -
Area Code 312612 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312609 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312608 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312607 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312606 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312605 - CHICAGO - Cellphone -
Area Code 312604 - CHICAGO - Landline - XO ILLINOIS, INC.
Area Code 312603 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312602 - CHICAGO - Landline - BROADWING COMMUNICATIONS, LLC - IL
Area Code 312601 - CHICAGO - Landline - MCIMETRO ACCESS TRANSMISSION SERVICES LLC
Area Code 312599 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312597 - CHICAGO - Cellphone -
Area Code 312596 - CHICAGO - Landline - TELEPORT COMMUNICATIONS GROUP - CHICAGO
Area Code 312594 - CHICAGO - - MCIMETRO ACCESS TRANSMISSION SERVICES LLC
Area Code 312595 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312593 - CHICAGO - Cellphone - T-MOBILE USA, INC.
Area Code 312592 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312591 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312590 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312589 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312587 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312588 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312583 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312582 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312580 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312578 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312577 - CHICAGO - Landline - MCI WORLDCOM COMMUNICATIONS, INC. - IL
Area Code 312576 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312575 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312574 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312573 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312572 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312571 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312569 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312570 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312568 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312567 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312566 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312565 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312564 - CHICAGO - - CIMCO COMMUNICATIONS, INC. - IL
Area Code 312563 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312562 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312560 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312559 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312558 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312557 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312556 - CHICAGO - Cellphone - SBC ATT ILLINOIS
Area Code 312554 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312552 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312553 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312551 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312550 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312548 - CHICAGO - - BROADWING COMMUNICATIONS, LLC - IL
Area Code 312547 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312546 - CHICAGO - Landline - LEVEL 3 COMMUNICATIONS, LLC - IL
Area Code 312545 - CHICAGO - Cellphone - SPRINT SPECTRUM L.P.
Area Code 312544 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312543 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312542 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312541 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312537 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312540 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312534 - CHICAGO - - SBC ATT ILLINOIS
Area Code 312533 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312532 - CHICAGO - Cellphone - T-MOBILE USA, INC.
Area Code 312531 - CLARENDON HILLS - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312530 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312529 - CHICAGO - Landline - AT&T LOCAL
Area Code 312527 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312528 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312526 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312525 - CHICAGO - Landline - MCIMETRO ACCESS TRANSMISSION SERVICES LLC
Area Code 312524 - BUFFALO GROVE - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312523 - CHICAGO - Cellphone - SPRINT SPECTRUM L.P.
Area Code 312521 - CHICAGO - Landline - AT&T LOCAL
Area Code 312520 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312519 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312518 - BUFFALO GROVE - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312516 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312515 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312514 - CHICAGO - Cellphone - AMERICAN MESSAGING (AM), INC.
Area Code 312513 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312512 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312510 - CLARENDON HILLS - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312507 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312506 - CHICAGO - Landline - CIMCO COMMUNICATIONS, INC. - IL
Area Code 312505 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312504 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312503 - CHICAGO - Landline - BROADWING COMMUNICATIONS, LLC - IL
Area Code 312502 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312501 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312499 - AURORA - Landline - SBC ATT ILLINOIS
Area Code 312498 - CHICAGO - Cellphone - SPRINT SPECTRUM L.P.
Area Code 312497 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312496 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312495 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312494 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312493 - CHICAGO - Cellphone - T-MOBILE USA, INC.
Area Code 312492 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312491 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312490 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312489 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312488 - CHICAGO - - PG TELECOM OF ILLINOIS INC. - IL
Area Code 312486 - CHICAGO - Landline - MCI WORLDCOM COMMUNICATIONS, INC. - IL
Area Code 312485 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312484 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312482 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312480 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312479 - CHICAGO - Landline - AT&T LOCAL
Area Code 312477 - CHICAGO - - HALO WIRELESS, INC
Area Code 312478 - CHICAGO - Landline -
Area Code 312476 - CHICAGO - Landline - UNITED STATES CELLULAR CORP. - ILLINOIS
Area Code 312475 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312474 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312473 - CHICAGO - - YMAX COMMUNICATIONS CORP. - IL
Area Code 312472 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312470 - CHICAGO - Landline - MCIMETRO ACCESS TRANSMISSION SERVICES LLC
Area Code 312469 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312467 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312466 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312465 - CHICAGO - Landline - US XCHANGE OF ILLINOIS LLC DBA CHOICE ONE COMM IL
Area Code 312464 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312463 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312462 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312461 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312460 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312458 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312457 - CHICAGO - Cellphone - AMERICAN MESSAGING (AM), INC.
Area Code 312456 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312455 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312454 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312453 - CHICAGO - Landline - MCI WORLDCOM COMMUNICATIONS, INC. - IL
Area Code 312452 - CHICAGO - Cellphone - AMERICAN MESSAGING (AM), INC.
Area Code 312451 - CHICAGO - Landline - T-MOBILE USA, INC.
Area Code 312450 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312449 - PARK RIDGE - Cellphone - AMERICAN MESSAGING (AM), INC.
Area Code 312447 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312446 - CHICAGO - Cellphone - NEXTEL COMMUNICATIONS, INC.
Area Code 312445 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312444 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312443 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312442 - DES PLAINES - Landline - SBC ATT ILLINOIS
Area Code 312441 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312438 - CHICAGO - Cellphone -
Area Code 312440 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312436 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312437 - CHICAGO - Cellphone - UNITED STATES CELLULAR CORP. - ILLINOIS
Area Code 312435 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312434 - - - SPRINT SPECTRUM L.P.
Area Code 312433 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312432 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312431 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312430 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312429 - CHICAGO - Landline - GLOBAL CROSSING LOCAL SERVICES, INC.-IL
Area Code 312428 - CHICAGO - Cellphone - LEVEL 3 COMMUNICATIONS, LLC - IL
Area Code 312427 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312426 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312425 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312424 - PARK RIDGE - Landline - SBC ATT ILLINOIS
Area Code 312423 - CHICAGO - Landline - BROADWING COMMUNICATIONS, LLC - IL
Area Code 312422 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312421 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312420 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312419 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312418 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312417 - CHICAGO - Cellphone - SBC ATT ILLINOIS
Area Code 312416 - CHICAGO - Landline - MCI WORLDCOM COMMUNICATIONS, INC. - IL
Area Code 312415 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312413 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312412 - BUFFALO GROVE - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312410 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312409 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312408 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312407 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312406 - BUFFALO GROVE - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312405 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312404 - CHICAGO - Cellphone - T-MOBILE USA, INC.
Area Code 312403 - WESTERN SPRINGS - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312402 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312401 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312400 - CHICAGO - Cellphone - AMERICAN MESSAGING (AM), INC.
Area Code 312399 - CHICAGO - Cellphone - SPRINT SPECTRUM L.P.
Area Code 312398 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312397 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312396 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312395 - CHICAGO - Landline - AT&T LOCAL
Area Code 312394 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312393 - CHICAGO - Cellphone - AMERICAN MESSAGING (AM), INC.
Area Code 312391 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312390 - CHICAGO - Cellphone - AMERICAN MESSAGING (AM), INC.
Area Code 312389 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312388 - CHICAGO - Cellphone - UNITED STATES CELLULAR CORP. - ILLINOIS
Area Code 312387 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312386 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312385 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312384 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312383 - CHICAGO - Cellphone -
Area Code 312382 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312381 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312380 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312379 - CHICAGO - Landline - OVATION COMMUNICATIONS OF ILLINOIS, INC.
Area Code 312378 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312377 - CHICAGO - Landline - XO ILLINOIS, INC.
Area Code 312376 - CHICAGO - Landline - CBEYOND COMMUNICATIONS, LLC - IL
Area Code 312375 - CHICAGO - Cellphone - T-MOBILE USA, INC.
Area Code 312374 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312373 - CHICAGO - Landline - BROADWING COMMUNICATIONS, LLC - IL
Area Code 312372 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312371 - CHICAGO - Cellphone - SPRINT SPECTRUM L.P.
Area Code 312370 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312368 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312369 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312367 - WESTERN SPRINGS - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312366 - WESTERN SPRINGS - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312365 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312364 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312363 - CHICAGO - Landline - RCN TELECOM SERVICES OF ILLINOIS, INC. - IL
Area Code 312362 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312361 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312360 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312359 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312358 - CHICAGO - Cellphone -
Area Code 312356 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312357 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312355 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312354 - SCHAUMBURG - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312353 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312352 - CLARENDON HILLS - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312351 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312350 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312349 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312348 - CHICAGO - Landline - NEUTRAL TANDEM-ILLINOIS, LLC - IL
Area Code 312347 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312346 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312345 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312344 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312343 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312342 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312341 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312338 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312339 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312337 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312336 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312335 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312334 - CHICAGO - Landline - GLOBALCOM, INC.-IL
Area Code 312333 - CHICAGO - Cellphone - AMERICAN MESSAGING (AM), INC.
Area Code 312332 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312331 - BUFFALO GROVE - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312330 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312329 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312328 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312327 - PLAINFIELD - Landline - XO ILLINOIS, INC.
Area Code 312326 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312325 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312324 - CHICAGO - Landline - LEVEL 3 COMMUNICATIONS, LLC - IL
Area Code 312323 - CHICAGO - Cellphone - AMERICAN MESSAGING (AM), INC.
Area Code 312322 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312321 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312320 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312318 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312317 - BUFFALO GROVE - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312316 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312315 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312314 - CLARENDON HILLS - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312313 - CHICAGO - Cellphone -
Area Code 312310 - DARIEN - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312309 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312308 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312307 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312306 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312305 - NORTHBROOK - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312304 - HINSDALE - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312303 - BUFFALO GROVE - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312302 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312301 - CLARENDON HILLS - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312300 - CHICAGO - Landline - NET TALK.COM, INC. - IL
Area Code 312299 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312297 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312298 - CICERO - Landline - SIGECOM, LLC - IL
Area Code 312296 - CHICAGO - Cellphone - NEXTEL COMMUNICATIONS, INC.
Area Code 312295 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312294 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312293 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312291 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312290 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312289 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312288 - CHICAGO - Landline - MCIMETRO ACCESS TRANSMISSION SERVICES LLC
Area Code 312287 - CHICAGO - Cellphone - NEXTEL COMMUNICATIONS, INC.
Area Code 312286 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312285 - CHICAGO - Cellphone - SPRINT SPECTRUM L.P.
Area Code 312284 - CHICAGO - Landline - XO ILLINOIS, INC.
Area Code 312283 - CHICAGO - Landline - GLOBAL CROSSING LOCAL SERVICES, INC.-IL
Area Code 312282 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312281 - CHICAGO - Landline - GLOBAL CROSSING LOCAL SERVICES, INC.-IL
Area Code 312280 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312279 - CHICAGO - Landline - MCIMETRO ACCESS TRANSMISSION SERVICES LLC
Area Code 312278 - CHICAGO - Landline - BROADWING COMMUNICATIONS, LLC - IL
Area Code 312277 - CHICAGO - Landline - ALLEGIANCE TELECOM, INC. - IL
Area Code 312276 - CHICAGO - Landline - ALLEGIANCE TELECOM, INC. - IL
Area Code 312275 - CHICAGO - Landline - ALLEGIANCE TELECOM, INC. - IL
Area Code 312274 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312272 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312271 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312269 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312268 - CHICAGO - Landline - BROADWING COMMUNICATIONS, LLC - IL
Area Code 312267 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312266 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312265 - CHICAGO - Landline - ACCESS ONE, INC. - IL
Area Code 312264 - CHICAGO - Landline - BROADWING COMMUNICATIONS, LLC - IL
Area Code 312263 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312262 - CHICAGO - Landline - ALLEGIANCE TELECOM, INC. - IL
Area Code 312261 - CHICAGO - Landline - BROADWING COMMUNICATIONS, LLC - IL
Area Code 312260 - CHICAGO - Landline - MCIMETRO ACCESS TRANSMISSION SERVICES LLC
Area Code 312259 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312258 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312256 - CHICAGO - Landline - ALLEGIANCE TELECOM, INC. - IL
Area Code 312255 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312254 - OAK BROOK - Landline - ALLEGIANCE TELECOM, INC. - IL
Area Code 312253 - CHICAGO - Landline - ALLEGIANCE TELECOM, INC. - IL
Area Code 312252 - CHICAGO - Landline - ALLEGIANCE TELECOM, INC. - IL
Area Code 312251 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312250 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312249 - CHICAGO - Cellphone - USA MOBILITY WIRELESS, INC.
Area Code 312247 - CHICAGO - Landline - GLOBALCOM, INC.-IL
Area Code 312246 - WHEELING - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312245 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312243 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312244 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312241 - CHICAGO - Cellphone -
Area Code 312242 - CHICAGO - Landline - TELEPORT COMMUNICATIONS GROUP - CHICAGO
Area Code 312240 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312239 - CHICAGO - Landline - AT&T LOCAL
Area Code 312238 - CHICAGO - Landline - BROADWING COMMUNICATIONS, LLC - IL
Area Code 312237 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312236 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312235 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312234 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312233 - BLUE ISLAND - Landline - SBC ATT ILLINOIS
Area Code 312232 - CHICAGO - Cellphone - AMERICAN MESSAGING (AM), INC.
Area Code 312231 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312230 - ROLLING MEADOWS - Landline - SBC ATT ILLINOIS
Area Code 312229 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312228 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312227 - CHICAGO - - SBC ATT ILLINOIS
Area Code 312225 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312226 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312224 - CHICAGO - Landline - BROADWING COMMUNICATIONS, LLC - IL
Area Code 312223 - CRYSTAL LAKE - Landline - SBC ATT ILLINOIS
Area Code 312222 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312221 - CHICAGO - Cellphone - SPRINT SPECTRUM L.P.
Area Code 312220 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312218 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312217 - CHICAGO - Cellphone - UNITED STATES CELLULAR CORP. - ILLINOIS
Area Code 312216 - CHICAGO - Cellphone -
Area Code 312215 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312214 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312213 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312212 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312210 - CHICAGO - Landline -
Area Code 312209 - CHICAGO - Cellphone - CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
Area Code 312208 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312207 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312206 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312205 - CHICAGO - Landline - ALLEGIANCE TELECOM, INC. - IL
Area Code 312204 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312203 - CHICAGO - Cellphone - NEW CINGULAR WIRELESS PCS, LLC - IL
Area Code 312201 - CHICAGO - Landline - SBC ATT ILLINOIS
Area Code 312202 - CHICAGO - Landline - SBC ATT ILLINOIS