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: 635

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
256-635 A Valley Head AL VYHDALXADS0  9789 CENTURYTEL TEL AL LLC (NORTHERN) DBA CENTURYLINK 476      
256-635 0 Valley Head AL VYHDALXADS0  9789 CENTURYTEL TEL AL LLC (NORTHERN) DBA CENTURYLINK 476      
256-635 1 Valley Head AL VYHDALXADS0  9789 CENTURYTEL TEL AL LLC (NORTHERN) DBA CENTURYLINK 476      
256-635 2 Valley Head AL BRHMALMT32Z  604E ONVOY, LLC - AL 476   2023-07-21   
256-635 4 Valley Head AL BRHMALMTY4X  624H ONVOY SPECTRUM, LLC 476   2023-06-23   
256-635 5 Valley Head AL BRHMALMT32Z  604E ONVOY, LLC - AL 476   2022-11-28   
256-635 6 Valley Head AL VYHDALXADS0  9789 CENTURYTEL TEL AL LLC (NORTHERN) DBA CENTURYLINK 476      
256-635 7 Valley Head AL BRHMALMT32Z  604E ONVOY, LLC - AL 476   2022-03-17   
256-635 8 Valley Head AL BRHMALXSGT2  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 476      

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.