Local Calling Guide

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NPA: 773 [Rate centres in NPA 773] [Dial plan for NPA 773]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
773-372 0 Chicago Zone 03-Kildare IL BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-08-19   
773-372 1 Chicago Zone 03-Kildare IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2009-05-13   
773-372 2 Chicago Zone 03-Kildare IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2008-10-09   
773-372 3 Chicago Zone 03-Kildare IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2008-10-09   
773-372 4 Chicago Zone 03-Kildare IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2008-10-09   
773-372 5 Chicago Zone 03-Kildare IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2008-10-09   
773-372 6 Chicago Zone 03-Kildare IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2008-10-09   
773-372 7 Chicago Zone 03-Kildare IL BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-08-19   
773-372 8 Chicago Zone 03-Kildare IL BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-08-19   
773-372 9 Chicago Zone 03-Kildare IL BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-08-19   
773-373 A Chicago Zone 07-Oakland IL CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-373 0 Chicago Zone 07-Oakland IL CHCGIL24DS6  224C ONVOY, LLC 358   2018-11-16   
773-373 1 Chicago Zone 07-Oakland IL CHCGILWUKMD  939H COMMIO, LLC 358   2021-08-29   
773-373 2 Chicago Zone 07-Oakland IL CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-373 3 Chicago Zone 07-Oakland IL CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-373 4 Chicago Zone 07-Oakland IL CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-373 5 Chicago Zone 07-Oakland IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2021-10-18   
773-373 6 Chicago Zone 07-Oakland IL CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-373 7 Chicago Zone 07-Oakland IL CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-373 8 Chicago Zone 07-Oakland IL CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-373 9 Chicago Zone 07-Oakland IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2011-06-13   
773-374 A Chicago Zone 09-South Chicago IL CHCGILSCDS0  9329 ILLINOIS BELL TEL CO 358      
773-375 A Chicago Zone 09-South Chicago IL CHCGILSCDS0  9329 ILLINOIS BELL TEL CO 358      
773-376 A Chicago Zone 06-Lafayette IL CHCGILLADS0  9329 ILLINOIS BELL TEL CO 358      
773-377 A Chicago Zone 11-O'Hare IL CHCGIL24DS0  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
773-377 0 Chicago Zone 11-O'Hare IL CHCGIL24DS0  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
773-377 1 Chicago Zone 11-O'Hare IL CHCGIL24DS0  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
773-377 2 Chicago Zone 11-O'Hare IL CHCGIL24DS0  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
773-377 3 Chicago Zone 11-O'Hare IL CHCGIL24DS6  224C ONVOY, LLC 358   2016-05-22   
773-377 4 Chicago Zone 11-O'Hare IL CHCGIL24DS6  224C ONVOY, LLC 358   2016-05-22   
773-377 5 Chicago Zone 11-O'Hare IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2011-01-01   
773-377 6 Chicago Zone 11-O'Hare IL CHCGIL24DS6  224C ONVOY, LLC 358   2011-06-22   
773-377 7 Chicago Zone 11-O'Hare IL CHCGILDT8MD  508J CENTURYLINK COMMUNICATIONS, LLC 358   2014-02-21   
773-377 8 Chicago Zone 11-O'Hare IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2011-09-24   
773-377 9 Chicago Zone 11-O'Hare IL CHCGILWUDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2016-10-13   
773-378 A Chicago Zone 05-Austin IL CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-378 0 Chicago Zone 05-Austin IL CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-378 1 Chicago Zone 05-Austin IL CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-378 2 Chicago Zone 05-Austin IL CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-378 3 Chicago Zone 05-Austin IL CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-378 4 Chicago Zone 05-Austin IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2024-10-07   
773-378 5 Chicago Zone 05-Austin IL CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-378 6 Chicago Zone 05-Austin IL CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-378 7 Chicago Zone 05-Austin IL BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2019-10-22   
773-378 8 Chicago Zone 05-Austin IL CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-378 9 Chicago Zone 05-Austin IL CHCGIL24DS6  224C ONVOY, LLC 358   2019-07-07   
773-379 A Chicago Zone 05-Austin IL CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-379 0 Chicago Zone 05-Austin IL CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-379 1 Chicago Zone 05-Austin IL CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-379 2 Chicago Zone 05-Austin IL CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      

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Last updated: Fri, 10 Jul 2026 02:55:48 UTC

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