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NPA: 312 [Rate centres in NPA 312] [Dial plan for NPA 312]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
312-478 7 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-05-18   
312-478 8 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-05-18   
312-478 9 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-05-18   
312-479 A Chicago Zone 01-Calumet IL OKBRILOAXEX  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-479 0 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2004-09-24   
312-479 1 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2003-09-07   
312-479 2 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2003-09-07   
312-479 3 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2003-09-07   
312-479 4 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2003-09-23   
312-479 5 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2003-09-30   
312-479 6 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2004-09-24   
312-479 7 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2004-09-24   
312-479 8 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2004-09-24   
312-479 9 Chicago Zone 01-Calumet IL OKBRILOAXEX  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-480 A Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-480 0 Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-480 1 Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-480 2 Chicago Zone 01-Wabash IL CHCGIL24DS6  224C ONVOY, LLC 358   2010-10-27   
312-480 3 Chicago Zone 01-Wabash IL CHCGIL24DS6  224C ONVOY, LLC 358   2010-10-27   
312-480 4 Chicago Zone 01-Wabash IL CHCGIL24DS6  224C ONVOY, LLC 358   2010-10-27   
312-480 5 Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-480 6 Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-480 7 Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-480 8 Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-480 9 Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-481 A Chicago Zone 01-Calumet IL ELGNILOTGT5  5562 METROPCS, INC. 358      
312-481 0 Chicago Zone 01-Calumet IL ELGNILOTGT5  5562 METROPCS, INC. 358   2017-08-28   
312-481 1 Chicago Zone 01-Calumet IL ELGNILOTGT5  5562 METROPCS, INC. 358   2017-08-28   
312-481 2 Chicago Zone 01-Calumet IL ELGNILOTGT5  5562 METROPCS, INC. 358   2017-08-28   
312-481 3 Chicago Zone 01-Calumet IL ELGNILOTGT5  5562 METROPCS, INC. 358   2017-08-28   
312-481 4 Chicago Zone 01-Calumet IL ELGNILOTGT5  5562 METROPCS, INC. 358   2017-08-29   
312-481 5 Chicago Zone 01-Calumet IL ELGNILOTGT5  5562 METROPCS, INC. 358   2017-08-29   
312-481 6 Chicago Zone 01-Calumet IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2018-07-26   
312-481 7 Chicago Zone 01-Calumet IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2018-07-26   
312-481 8 Chicago Zone 01-Calumet IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2018-07-26   
312-481 9 Chicago Zone 01-Calumet IL ELGNILOTGT5  5562 METROPCS, INC. 358   2017-08-28   
312-482 A Chicago Zone 01-Superior IL CHCGILSUDS2  9329 ILLINOIS BELL TEL CO 358      
312-483 A Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
312-483 0 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-10   
312-483 1 Chicago Zone 01-Calumet IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2014-10-08   
312-483 2 Chicago Zone 01-Calumet IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2014-10-08   
312-483 3 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-06   
312-483 4 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-06   
312-483 5 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-06   
312-483 6 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-06   
312-483 7 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-06   
312-483 8 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-06   
312-483 9 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-06   
312-484 A Chicago Zone 01-Wabash IL LBRDILGOAMD  6630 USA MOBILITY WIRELESS, INC. 358      
312-485 A Chicago Zone 01-Wabash IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-486 A Chicago Zone 01-Calumet IL EGVGILIFDS1  7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358      
312-486 0 Chicago Zone 01-Calumet IL EGVGILIFDS1  7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2004-06-17   
312-486 1 Chicago Zone 01-Calumet IL EGVGILIFDS1  7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2004-06-17   
312-486 2 Chicago Zone 01-Calumet IL EGVGILIFDS1  7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2004-06-17   
312-486 3 Chicago Zone 01-Calumet IL EGVGILIFDS1  7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2004-06-17   
312-486 4 Chicago Zone 01-Calumet IL EGVGILIFDS1  7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2004-06-17   
312-486 5 Chicago Zone 01-Calumet IL EGVGILIFDS1  7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2004-06-17   
312-486 6 Chicago Zone 01-Calumet IL EGVGILIFDS1  7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2004-06-17   
312-486 7 Chicago Zone 01-Calumet IL EGVGILIFDS1  7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2004-06-17   
312-486 8 Chicago Zone 01-Calumet IL EGVGILIFDS1  7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2004-06-17   
312-486 9 Chicago Zone 01-Calumet IL EGVGILIFDS1  7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2004-06-17   
312-487 A Chicago Zone 01-Calumet IL ELGNILOTGT5  5562 METROPCS, INC. 358      
312-487 0 Chicago Zone 01-Calumet IL ELGNILOTGT5  5562 METROPCS, INC. 358   2014-12-18   
312-487 1 Chicago Zone 01-Calumet IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-12-19   
312-487 2 Chicago Zone 01-Calumet IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-12-19   
312-487 3 Chicago Zone 01-Calumet IL CHCGIL24DS6  224C ONVOY, LLC 358   2014-12-30   
312-487 4 Chicago Zone 01-Calumet IL CHCGIL24DS6  224C ONVOY, LLC 358   2014-12-30   
312-487 5 Chicago Zone 01-Calumet IL CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358   2014-12-19   
312-487 6 Chicago Zone 01-Calumet IL ELGNILOTGT5  5562 METROPCS, INC. 358   2014-12-18   
312-487 7 Chicago Zone 01-Calumet IL ELGNILOTGT5  5562 METROPCS, INC. 358   2014-12-18   
312-487 8 Chicago Zone 01-Calumet IL ELGNILOTGT5  5562 METROPCS, INC. 358   2014-12-18   
312-487 9 Chicago Zone 01-Calumet IL ELGNILOTGT5  5562 METROPCS, INC. 358   2014-12-18   
312-488 A Chicago Zone 01-Calumet IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-488 0 Chicago Zone 01-Calumet IL CHCGIL24DS6  224C ONVOY, LLC 358   2019-02-18   
312-488 1 Chicago Zone 01-Calumet IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-10-25   
312-488 2 Chicago Zone 01-Calumet IL DWGVILMCPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2009-10-31   
312-488 3 Chicago Zone 01-Calumet IL DWGVILMCPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2009-10-31   
312-488 4 Chicago Zone 01-Calumet IL DWGVILMCPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2009-10-31   
312-488 5 Chicago Zone 01-Calumet IL BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2010-02-14   
312-488 6 Chicago Zone 01-Calumet IL BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2010-02-14   
312-488 7 Chicago Zone 01-Calumet IL BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2010-02-14   
312-488 8 Chicago Zone 01-Calumet IL DWGVILMCPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2010-02-14   
312-488 9 Chicago Zone 01-Calumet IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-04   
312-489 A Chicago Zone 01-Wabash IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-489 0 Chicago Zone 01-Wabash IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-489 1 Chicago Zone 01-Wabash IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-489 2 Chicago Zone 01-Wabash IL DWGVILMCPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2010-02-14   
312-489 3 Chicago Zone 01-Wabash IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-489 4 Chicago Zone 01-Wabash IL ELGNILOTGT5  5562 METROPCS, INC. 358   2009-05-22   
312-489 5 Chicago Zone 01-Wabash IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2013-07-26   
312-489 6 Chicago Zone 01-Wabash IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-489 7 Chicago Zone 01-Wabash IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-489 8 Chicago Zone 01-Wabash IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-08-22   
312-489 9 Chicago Zone 01-Wabash IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-490 A Chicago Zone 01-Wabash IL LBRDILGOAMD  6630 USA MOBILITY WIRELESS, INC. 358      
312-491 A Chicago Zone 01-Monroe IL CHCGILMODS0  9329 ILLINOIS BELL TEL CO 358      
312-492 A Chicago Zone 01-Monroe IL CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-492 0 Chicago Zone 01-Monroe IL CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-492 1 Chicago Zone 01-Monroe IL CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-492 2 Chicago Zone 01-Monroe IL CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      

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Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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