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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
312-858 9 Chicago Zone 01-Calumet IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2016-02-20   
312-859 A Chicago Zone 01-Wabash IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-860 A Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-861 A Chicago Zone 01-Lakeshore IL CHCGILLRDS0  9329 ILLINOIS BELL TEL CO 358      
312-862 A Chicago Zone 01-Calumet IL CHCGILFRDS1  9329 ILLINOIS BELL TEL CO 358      
312-862 0 Chicago Zone 01-Calumet IL CHCGILFRDS1  9329 ILLINOIS BELL TEL CO 358   2006-03-18   
312-862 1 Chicago Zone 01-Calumet IL CHCGILFRDS1  9329 ILLINOIS BELL TEL CO 358   2006-03-18   
312-862 2 Chicago Zone 01-Calumet IL CHCGILFRDS1  9329 ILLINOIS BELL TEL CO 358   2006-03-18   
312-862 3 Chicago Zone 01-Calumet IL CHCGILFRDS1  9329 ILLINOIS BELL TEL CO 358   2006-03-18   
312-862 4 Chicago Zone 01-Calumet IL CHCGILFRDS1  9329 ILLINOIS BELL TEL CO 358   2006-03-18   
312-862 5 Chicago Zone 01-Calumet IL CHCGILFRDS1  9329 ILLINOIS BELL TEL CO 358   2006-03-18   
312-862 6 Chicago Zone 01-Calumet IL CHCGILFRDS1  9329 ILLINOIS BELL TEL CO 358   2006-03-18   
312-862 7 Chicago Zone 01-Calumet IL CHCGILFRDS1  9329 ILLINOIS BELL TEL CO 358   2006-03-18   
312-862 8 Chicago Zone 01-Calumet IL CHCGILFRDS1  9329 ILLINOIS BELL TEL CO 358   2006-03-18   
312-862 9 Chicago Zone 01-Calumet IL CHCGILFRDS1  9329 ILLINOIS BELL TEL CO 358   2006-03-18   
312-863 A Chicago Zone 01-Calumet IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2024-12-09   
312-863 0 Chicago Zone 01-Calumet IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2011-05-07   
312-863 1 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2005-06-19   
312-863 2 Chicago Zone 01-Calumet IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2000-03-13   
312-863 3 Chicago Zone 01-Calumet IL BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2000-03-07   
312-863 4 Chicago Zone 01-Calumet IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358      
312-863 5 Chicago Zone 01-Calumet IL BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2000-03-07   
312-863 6 Chicago Zone 01-Calumet IL BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2000-03-07   
312-863 7 Chicago Zone 01-Calumet IL BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2000-03-07   
312-863 8 Chicago Zone 01-Calumet IL BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2000-03-07   
312-863 9 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2005-06-19   
312-864 A Chicago Zone 01-Monroe IL CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-865 A Wheeling IL SCBGILRRGT1  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-865 9 Wheeling IL SCBGILRRGT1  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-866 A Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
312-866 0 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-24   
312-866 1 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-24   
312-866 2 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-24   
312-866 3 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-24   
312-866 4 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-24   
312-866 5 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-24   
312-866 6 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-24   
312-866 7 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-24   
312-866 8 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-24   
312-866 9 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-10-24   
312-867 A Chicago Zone 01-Superior IL CHCGILSUDS0  9329 ILLINOIS BELL TEL CO 358      
312-868 A Chicago Zone 01-Calumet IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358      
312-868 0 Chicago Zone 01-Calumet IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2016-02-04   
312-868 1 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2016-02-10   
312-868 2 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2016-02-10   
312-868 3 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2016-02-10   
312-868 4 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2016-02-10   
312-868 5 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2016-02-10   
312-868 6 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2016-02-10   
312-868 7 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2016-02-10   
312-868 8 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2016-02-10   
312-868 9 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2016-02-10   
312-869 A Chicago Zone 01-Canal IL CHCGILCLDS3  9329 ILLINOIS BELL TEL CO 358      
312-869 0 Chicago Zone 01-Canal IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-02-10   
312-869 1 Chicago Zone 01-Canal IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-02-10   
312-869 2 Chicago Zone 01-Canal IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-04   
312-869 3 Chicago Zone 01-Canal IL CHCGILCLDS3  9329 ILLINOIS BELL TEL CO 358      
312-869 4 Chicago Zone 01-Canal IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-04   
312-869 5 Chicago Zone 01-Canal IL CHCGILCLDS3  9329 ILLINOIS BELL TEL CO 358      
312-869 6 Chicago Zone 01-Canal IL CHCGILCLDS3  9329 ILLINOIS BELL TEL CO 358      
312-869 7 Chicago Zone 01-Canal IL CHCGILCLDS3  9329 ILLINOIS BELL TEL CO 358      
312-869 8 Chicago Zone 01-Canal IL CHCGILCLDS3  9329 ILLINOIS BELL TEL CO 358      
312-869 9 Chicago Zone 01-Canal IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-04   
312-870 A Chicago Zone 01-Calumet IL CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358      
312-870 0 Chicago Zone 01-Calumet IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-04   
312-870 1 Chicago Zone 01-Calumet IL CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358      
312-870 2 Chicago Zone 01-Calumet IL CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358      
312-870 3 Chicago Zone 01-Calumet IL CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358      
312-870 4 Chicago Zone 01-Calumet IL CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358      
312-870 5 Chicago Zone 01-Calumet IL CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358      
312-870 6 Chicago Zone 01-Calumet IL CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358      
312-870 7 Chicago Zone 01-Calumet IL CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358      
312-870 8 Chicago Zone 01-Calumet IL CHCGILFRDS1  9329 ILLINOIS BELL TEL CO 358   2000-11-03   
312-870 9 Chicago Zone 01-Calumet IL CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358      
312-871 A Chicago Zone 01-Calumet IL BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-871 0 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2015-10-13   
312-871 1 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2015-10-13   
312-871 2 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2015-10-13   
312-871 3 Chicago Zone 01-Calumet IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2016-06-25   
312-871 4 Chicago Zone 01-Calumet IL CHCGILCGDS1  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2015-10-13   
312-871 5 Chicago Zone 01-Calumet IL CHCGILCGDS1  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2015-10-13   
312-871 6 Chicago Zone 01-Calumet IL CHCGILCGDS1  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2015-10-13   
312-871 7 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2015-10-13   
312-871 8 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2015-10-13   
312-871 9 Chicago Zone 01-Calumet IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2015-11-23   
312-872 A Chicago Zone 01-Calumet IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-872 0 Chicago Zone 01-Calumet IL CHCGIL24DS6  224C ONVOY, LLC 358   2018-11-06   
312-872 1 Chicago Zone 01-Calumet IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2018-12-20   
312-872 2 Chicago Zone 01-Calumet IL ELGNILOTGT5  5562 METROPCS, INC. 358   2018-10-21   
312-872 3 Chicago Zone 01-Calumet IL CHCGIL24DS6  224C ONVOY, LLC 358   2019-06-28   
312-872 4 Chicago Zone 01-Calumet IL CHCGIL24DS6  224C ONVOY, LLC 358   2019-06-28   
312-872 5 Chicago Zone 01-Calumet IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2018-09-02   
312-872 6 Chicago Zone 01-Calumet IL OKBRILOAXEX  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2018-11-19   
312-872 7 Chicago Zone 01-Calumet IL CHCGIL24DS6  224C ONVOY, LLC 358   2019-06-28   
312-872 8 Chicago Zone 01-Calumet IL CHCGIL24DS6  224C ONVOY, LLC 358   2019-06-28   
312-872 9 Chicago Zone 01-Calumet IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2018-12-20   
312-873 A Chicago Zone 01-Canal IL EGVGILIFDS1  7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358      
312-874 A Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
312-874 0 Chicago Zone 01-Calumet IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2015-07-22   
312-874 1 Chicago Zone 01-Calumet IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2015-07-22   

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

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