Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

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

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
773-441 0 Chicago Zone 03-Kildare IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-06   
773-441 1 Chicago Zone 03-Kildare IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-06   
773-441 2 Chicago Zone 03-Kildare IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-06   
773-441 3 Chicago Zone 03-Kildare IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-06   
773-441 4 Chicago Zone 03-Kildare IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-06   
773-441 5 Chicago Zone 03-Kildare IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-06   
773-441 6 Chicago Zone 03-Kildare IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-06   
773-441 7 Chicago Zone 03-Kildare IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-06   
773-441 8 Chicago Zone 03-Kildare IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-06   
773-441 9 Chicago Zone 03-Kildare IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-06   
773-442 A Chicago Zone 02-Irving IL EGVGILIFDS0  7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358      
773-442 0 Chicago Zone 02-Irving IL   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358      
773-442 1 Chicago Zone 02-Irving IL   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358      
773-442 2 Chicago Zone 02-Irving IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2008-12-12   
773-442 3 Chicago Zone 02-Irving IL   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358      
773-442 4 Chicago Zone 02-Irving IL   9329 ILLINOIS BELL TEL CO 358   2000-06-13   
773-442 5 Chicago Zone 02-Irving IL   9329 ILLINOIS BELL TEL CO 358   2000-06-13   
773-442 6 Chicago Zone 02-Irving IL   9329 ILLINOIS BELL TEL CO 358   2000-06-13   
773-442 7 Chicago Zone 02-Irving IL   6529 T-MOBILE USA, INC. 358   2025-05-07   
773-442 8 Chicago Zone 02-Irving IL   9329 ILLINOIS BELL TEL CO 358   2001-04-24   
773-442 9 Chicago Zone 02-Irving IL   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358      
773-443 A Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2024-01-30   
773-444 A Chicago Zone 03-Newcastle IL PRRGILXLDS1  9329 ILLINOIS BELL TEL CO 358      
773-444 0 Chicago Zone 03-Newcastle IL   9329 ILLINOIS BELL TEL CO 358      
773-444 1 Chicago Zone 03-Newcastle IL   9329 ILLINOIS BELL TEL CO 358      
773-444 2 Chicago Zone 03-Newcastle IL   9329 ILLINOIS BELL TEL CO 358      
773-444 3 Chicago Zone 03-Newcastle IL   9329 ILLINOIS BELL TEL CO 358      
773-444 4 Chicago Zone 03-Newcastle IL   9329 ILLINOIS BELL TEL CO 358      
773-444 5 Chicago Zone 03-Newcastle IL   9329 ILLINOIS BELL TEL CO 358      
773-444 6 Chicago Zone 03-Newcastle IL   9329 ILLINOIS BELL TEL CO 358      
773-444 7 Chicago Zone 03-Newcastle IL   6529 T-MOBILE USA, INC. 358   2005-07-07   
773-444 8 Chicago Zone 03-Newcastle IL   6529 T-MOBILE USA, INC. 358   2005-07-05   
773-444 9 Chicago Zone 03-Newcastle IL   6529 T-MOBILE USA, INC. 358   2005-07-05   
773-445 A Chicago Zone 10-Beverly IL CHCGILBEDS0  9329 ILLINOIS BELL TEL CO 358      
773-446 A Chicago Zone 06-Kedzie IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-446 0 Chicago Zone 06-Kedzie IL   624H ONVOY SPECTRUM, LLC 358   2022-01-07   
773-446 1 Chicago Zone 06-Kedzie IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-446 2 Chicago Zone 06-Kedzie IL   224C ONVOY, LLC 358   2023-07-08   
773-446 3 Chicago Zone 06-Kedzie IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-446 4 Chicago Zone 06-Kedzie IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
773-446 5 Chicago Zone 06-Kedzie IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-446 6 Chicago Zone 06-Kedzie IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-446 7 Chicago Zone 06-Kedzie IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-446 8 Chicago Zone 06-Kedzie IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-446 9 Chicago Zone 06-Kedzie IL   624H ONVOY SPECTRUM, LLC 358   2022-01-07   
773-447 A Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
773-448 A Chicago Zone 07-Stewart IL   224C ONVOY, LLC 358   2025-12-06   
773-448 0 Chicago Zone 07-Stewart IL   224C ONVOY, LLC 358   2025-12-06   
773-448 1 Chicago Zone 07-Stewart IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2026-01-09   
773-448 2 Chicago Zone 07-Stewart IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2026-01-09   
773-448 3 Chicago Zone 07-Stewart IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2026-01-09   
773-448 6 Chicago Zone 07-Stewart IL   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2025-12-08   
773-448 7 Chicago Zone 07-Stewart IL   224C ONVOY, LLC 358   2026-01-11   
773-448 8 Chicago Zone 07-Stewart IL   224C ONVOY, LLC 358   2026-01-11   
773-448 9 Chicago Zone 07-Stewart IL   224C ONVOY, LLC 358   2026-01-11   
773-449 A Chicago Zone 09-Mitchell IL CHCGIL24SMD  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
773-449 0 Chicago Zone 09-Mitchell IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-27   
773-449 1 Chicago Zone 09-Mitchell IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-27   
773-449 2 Chicago Zone 09-Mitchell IL   460K FIRST COMMUNICATIONS, LLC 358   2004-07-16   
773-449 3 Chicago Zone 09-Mitchell IL   8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
773-449 4 Chicago Zone 09-Mitchell IL   8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
773-449 5 Chicago Zone 09-Mitchell IL   829J PAETEC ITEL, LLC 358   2004-01-21   
773-449 6 Chicago Zone 09-Mitchell IL   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2006-12-11   
773-449 7 Chicago Zone 09-Mitchell IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-27   
773-449 8 Chicago Zone 09-Mitchell IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-27   
773-449 9 Chicago Zone 09-Mitchell IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-02-17   
773-450 A Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
773-451 A Chicago Zone 07-Oakland IL CHCGILOKDS0  9329 ILLINOIS BELL TEL CO 358      
773-451 0 Chicago Zone 07-Oakland IL   9329 ILLINOIS BELL TEL CO 358      
773-451 1 Chicago Zone 07-Oakland IL   9329 ILLINOIS BELL TEL CO 358      
773-451 2 Chicago Zone 07-Oakland IL   9329 ILLINOIS BELL TEL CO 358      
773-451 3 Chicago Zone 07-Oakland IL   9329 ILLINOIS BELL TEL CO 358      
773-451 4 Chicago Zone 07-Oakland IL   9329 ILLINOIS BELL TEL CO 358      
773-451 5 Chicago Zone 07-Oakland IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2008-12-12   
773-451 6 Chicago Zone 07-Oakland IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2006-03-05   
773-451 7 Chicago Zone 07-Oakland IL   939H COMMIO, LLC 358   2021-08-29   
773-451 8 Chicago Zone 07-Oakland IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2005-10-13   
773-451 9 Chicago Zone 07-Oakland IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2005-10-13   
773-452 A Chicago Zone 01-Wabash IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
773-453 A Chicago Zone 11-O'Hare IL BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-453 0 Chicago Zone 11-O'Hare IL   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-453 2 Chicago Zone 11-O'Hare IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-05-19   
773-453 3 Chicago Zone 11-O'Hare IL   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
773-453 4 Chicago Zone 11-O'Hare IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2012-06-01   
773-453 5 Chicago Zone 11-O'Hare IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-05-19   
773-453 6 Chicago Zone 11-O'Hare IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2013-05-06   
773-453 7 Chicago Zone 11-O'Hare IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2013-12-13   
773-453 8 Chicago Zone 11-O'Hare IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2013-12-13   
773-453 9 Chicago Zone 11-O'Hare IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2013-12-13   
773-454 A Chicago Zone 03-Kildare IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
773-454 0 Chicago Zone 03-Kildare IL   6529 T-MOBILE USA, INC. 358      
773-454 1 Chicago Zone 03-Kildare IL   6529 T-MOBILE USA, INC. 358      
773-454 2 Chicago Zone 03-Kildare IL   6529 T-MOBILE USA, INC. 358      
773-454 3 Chicago Zone 03-Kildare IL   6529 T-MOBILE USA, INC. 358      
773-454 4 Chicago Zone 03-Kildare IL   6529 T-MOBILE USA, INC. 358      
773-454 5 Chicago Zone 03-Kildare IL   6529 T-MOBILE USA, INC. 358      
773-454 6 Chicago Zone 03-Kildare IL   6529 T-MOBILE USA, INC. 358      
773-454 7 Chicago Zone 03-Kildare IL   6529 T-MOBILE USA, INC. 358      
773-454 8 Chicago Zone 03-Kildare IL   6529 T-MOBILE USA, INC. 358      
773-454 9 Chicago Zone 03-Kildare IL   6529 T-MOBILE USA, INC. 358      

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 >>

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.