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
773-245 6 Chicago Zone 08-Portsmouth IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2011-06-13   
773-245 7 Chicago Zone 08-Portsmouth IL CHCGIL24DS6  224C ONVOY, LLC 358   2010-10-27   
773-245 8 Chicago Zone 08-Portsmouth IL   224C ONVOY, LLC 358   2025-09-27   
773-245 9 Chicago Zone 08-Portsmouth IL   224C ONVOY, LLC 358   2025-09-27   
773-246 A Chicago Zone 04-Humboldt IL HMNDINPRCM0  6795 INDIANA PAGING NETWORK, INC. 358      
773-247 A Chicago Zone 06-Lafayette IL CHCGILLADS0  9329 ILLINOIS BELL TEL CO 358      
773-248 A Chicago Zone 04-Lakeview IL CHCGILLWDS1  9329 ILLINOIS BELL TEL CO 358      
773-249 A Chicago Zone 11-O'Hare IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-249 0 Chicago Zone 11-O'Hare IL CHCGILWUJMD  073H TELNYX LLC 358   2019-03-18   
773-249 1 Chicago Zone 11-O'Hare IL BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2005-10-29   
773-249 2 Chicago Zone 11-O'Hare IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2018-05-12   
773-249 3 Chicago Zone 11-O'Hare IL CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358   2004-11-12   
773-249 4 Chicago Zone 11-O'Hare IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-06-03   
773-249 5 Chicago Zone 11-O'Hare IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2008-07-02   
773-249 6 Chicago Zone 11-O'Hare IL CHCGIL24DS6  224C ONVOY, LLC 358   2016-05-22   
773-249 7 Chicago Zone 11-O'Hare IL CHCGIL24DS6  224C ONVOY, LLC 358   2016-05-22   
773-249 8 Chicago Zone 11-O'Hare IL CHCGIL24DS6  224C ONVOY, LLC 358   2010-02-26   
773-249 9 Chicago Zone 11-O'Hare IL CHCGIL24DS6  224C ONVOY, LLC 358   2016-05-22   
773-250 A Chicago Zone 02-Irving IL BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-250 0 Chicago Zone 02-Irving IL BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-250 1 Chicago Zone 02-Irving IL BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-250 2 Chicago Zone 02-Irving IL BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-250 3 Chicago Zone 02-Irving IL CHCGIL24DS6  224C ONVOY, LLC 358   2015-12-31   
773-250 4 Chicago Zone 02-Irving IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2005-11-19   
773-250 5 Chicago Zone 02-Irving IL CHCGILDTKMD  5447 ACCESS ONE, INC. - IL 358   2006-01-20   
773-250 6 Chicago Zone 02-Irving IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-10-25   
773-250 7 Chicago Zone 02-Irving IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2012-02-24   
773-250 8 Chicago Zone 02-Irving IL BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-250 9 Chicago Zone 02-Irving IL BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-251 A Chicago Zone 03-Kildare IL BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
773-252 A Chicago Zone 04-Humboldt IL CHCGILHBDS1  9329 ILLINOIS BELL TEL CO 358      
773-253 A Chicago Zone 10-Beverly IL CHCGIL24DS0  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
773-253 0 Chicago Zone 10-Beverly IL CHCGIL24DS0  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
773-253 1 Chicago Zone 10-Beverly IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2007-03-29   
773-253 2 Chicago Zone 10-Beverly IL CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358   2005-06-24   
773-253 3 Chicago Zone 10-Beverly IL CHCGILDTKMD  5447 ACCESS ONE, INC. - IL 358   2006-01-20   
773-253 4 Chicago Zone 10-Beverly IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2005-03-14   
773-253 5 Chicago Zone 10-Beverly IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2005-03-14   
773-253 6 Chicago Zone 10-Beverly IL   145J TERRA NOVA TELECOM INC. 358   2021-07-17   
773-253 7 Chicago Zone 10-Beverly IL CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358   2007-08-02   
773-253 8 Chicago Zone 10-Beverly IL CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358      
773-253 9 Chicago Zone 10-Beverly IL CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358   2005-10-28   
773-254 A Chicago Zone 06-Lafayette IL CHCGILLADS0  9329 ILLINOIS BELL TEL CO 358      
773-255 A Chicago Zone 03-Kildare IL BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
773-256 A Chicago Zone 07-Hyde Park IL CHCGILDODS0  9329 ILLINOIS BELL TEL CO 358      
773-256 0 Chicago Zone 07-Hyde Park IL CHCGILDODS0  9329 ILLINOIS BELL TEL CO 358      
773-256 1 Chicago Zone 07-Hyde Park IL CHCGILDODS0  9329 ILLINOIS BELL TEL CO 358      
773-256 2 Chicago Zone 07-Hyde Park IL CHCGILDODS0  9329 ILLINOIS BELL TEL CO 358      
773-256 3 Chicago Zone 07-Hyde Park IL CHCGILDODS0  9329 ILLINOIS BELL TEL CO 358      
773-256 4 Chicago Zone 07-Hyde Park IL CHCGILDODS0  9329 ILLINOIS BELL TEL CO 358      

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Last updated: Sun, 17 May 2026 03:26:51 UTC

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