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: 231

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
773-231 A Chicago Zone 07-Stewart IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-231 0 Chicago Zone 07-Stewart IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358      
773-231 1 Chicago Zone 07-Stewart IL   400G CLEAR RATE COMMUNICATIONS, INC. - IL 358      
773-231 2 Chicago Zone 07-Stewart IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358      
773-231 3 Chicago Zone 07-Stewart IL ELGNILOT0MD  6529 T-MOBILE USA, INC. 358      
773-231 4 Chicago Zone 07-Stewart IL ELGNILOT0MD  6529 T-MOBILE USA, INC. 358      
773-231 5 Chicago Zone 07-Stewart IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
773-231 6 Chicago Zone 07-Stewart IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358      
773-231 7 Chicago Zone 07-Stewart IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358      
773-231 8 Chicago Zone 07-Stewart IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358      
773-231 9 Chicago Zone 07-Stewart IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.