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: 256 [Rate centres in NPA 256] [Dial plan for NPA 256]

NXX: 857

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
256-857 A Albertville AL BRHMALMT88Z  516C AT&T CORP. 476      
256-857 0 Albertville AL   073H TELNYX LLC 476   2017-09-04   
256-857 1 Albertville AL   604E ONVOY, LLC - AL 476   2016-06-20   
256-857 2 Albertville AL   604E ONVOY, LLC - AL 476   2016-06-20   
256-857 3 Albertville AL   604E ONVOY, LLC - AL 476   2016-06-20   
256-857 4 Albertville AL   604E ONVOY, LLC - AL 476   2018-02-08   
256-857 5 Albertville AL   604E ONVOY, LLC - AL 476   2016-02-26   
256-857 6 Albertville AL   604E ONVOY, LLC - AL 476   2016-02-26   
256-857 7 Albertville AL   516C AT&T CORP. 476   2010-02-05   
256-857 8 Albertville AL   5562 METROPCS, INC. 476   2018-05-24   
256-857 9 Albertville AL   604E ONVOY, LLC - AL 476   2019-04-13   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.