Local Calling Guide

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Chicago Zone 01-Calumet, IL

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
312-628 1   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-628 2   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-628 3   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-628 4   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-628 5   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-628 6   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-628 7   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-628 8   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-631 A CHCGILDT8MD  508J CENTURYLINK COMMUNICATIONS, LLC 358      
312-631 0 CHCGIL24DS6  224C ONVOY, LLC 358   2013-05-24   
312-631 1 CHCGIL24DS6  224C ONVOY, LLC 358   2013-05-24   
312-631 2 CHCGILCLDS7  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2013-07-05   
312-631 3 CHCGILCLXOX  516C AT&T CORP. 358   2013-07-03   
312-631 4 ELGNILOTGT5  5562 METROPCS, INC. 358   2013-05-01   
312-631 5 ELGNILOTGT5  5562 METROPCS, INC. 358   2013-05-01   
312-631 6 ELGNILOTGT5  5562 METROPCS, INC. 358   2013-05-01   
312-631 7 CHCGILDT8MD  508J CENTURYLINK COMMUNICATIONS, LLC 358   2013-05-31   
312-631 8 ELGNILOTGT5  5562 METROPCS, INC. 358   2013-05-01   
312-631 9 ELGNILOTGT5  5562 METROPCS, INC. 358   2013-05-01   
312-635 A   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-635 1   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-635 2   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-635 3 CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358   2014-06-15   
312-635 4 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-635 5 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-635 6 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-635 7 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-635 8 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-635 9 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-637 A CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-637 0 BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2011-08-07   
312-637 1 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-637 2 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-637 3 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-637 4 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-637 5 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-637 6 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-637 7 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-637 8 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-637 9 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-638 A CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-638 0 CHCGILCNHMD  073H TELNYX LLC 358   2022-08-25   
312-638 1 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-638 2 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-638 3 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-638 4 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-638 5 CHCGILCPDS9  138G LEVEL 3 TELECOM OF ILLINOIS, LLC - IL 358   2015-04-24   
312-638 6 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-638 7 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-638 8 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-638 9 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-639 A RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-639 0 RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2017-12-03   
312-639 1 RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2017-12-03   
312-639 2 RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2017-12-03   
312-639 3 RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2017-12-03   
312-639 4 RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2017-12-03   
312-639 5 RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2017-12-03   
312-639 6 RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2017-12-03   
312-639 7 RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2017-12-03   
312-639 8 RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2017-12-03   
312-639 9 RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2017-12-03   
312-646 A CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-646 0 CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-04   
312-646 1 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2007-10-01   
312-646 2 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2007-10-01   
312-646 3 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2007-10-01   
312-646 4 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2007-10-01   
312-646 5 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2007-10-01   
312-646 6 CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2008-02-05   
312-646 7 CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2008-02-05   
312-646 8 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2008-06-27   
312-646 9 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2008-06-27   
312-647 A ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
312-647 0 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2013-08-19   
312-647 1 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2013-08-19   
312-647 2 CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2013-07-16   
312-647 3 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2013-08-19   
312-647 4 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2013-07-15   
312-647 5 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2013-07-15   
312-647 6 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2013-07-15   
312-647 7 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2013-07-15   
312-647 8 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2013-07-15   
312-647 9 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2013-07-15   
312-656 A ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
312-656 0 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
312-656 1 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
312-656 2 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
312-656 3 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
312-656 4 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
312-656 5 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
312-656 6 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
312-656 7 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
312-656 8 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
312-656 9 ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
312-667 A CHCGILWUDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358      
312-667 0 CHCGILWUDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2012-10-22   
312-667 1 CHCGILWUDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2012-10-22   
312-667 2 CHCGILWUDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2012-10-22   
312-667 3 CHCGILWUDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2012-10-22   

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Last updated: Tue, 07 Oct 2025 16:47:53 UTC

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