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: 250

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
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 CHCGILMF6MD  6529 T-MOBILE USA, INC. 358   2005-11-19   
773-250 5 Chicago Zone 02-Irving IL CHCGILDTDS3  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      

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.