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]

NXX: 309

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
773-309 A Chicago Zone 05-Austin IL CHCGILWUX1X  4717 PAETEC COMMUNICATIONS, INC. - IL 358      
773-309 0 Chicago Zone 05-Austin IL CHCGILWUX1X  4717 PAETEC COMMUNICATIONS, INC. - IL 358      
773-309 1 Chicago Zone 05-Austin IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-02-25   
773-309 2 Chicago Zone 05-Austin IL CHCGILCNHMD  073H TELNYX LLC 358   2022-12-15   
773-309 3 Chicago Zone 05-Austin IL CHCGIL24DS6  224C ONVOY, LLC 358   2023-07-14   
773-309 4 Chicago Zone 05-Austin IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2004-11-22   
773-309 5 Chicago Zone 05-Austin IL CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358   2022-01-07   
773-309 6 Chicago Zone 05-Austin IL CHCGIL24DS6  224C ONVOY, LLC 358   2004-09-16   
773-309 7 Chicago Zone 05-Austin IL CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358   2022-01-07   
773-309 8 Chicago Zone 05-Austin IL CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358   2006-03-31   
773-309 9 Chicago Zone 05-Austin IL CHCGILWUX1X  4717 PAETEC COMMUNICATIONS, INC. - IL 358      

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.