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: 674

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
256-674 A Valley Head AL BRHMALMT32Z  604E ONVOY, LLC - AL 476   2024-02-19   
256-674 0 Valley Head AL BRHMALMT32Z  604E ONVOY, LLC - AL 476      
256-674 1 Valley Head AL BRHNALWN0MD  349D CHARTER FIBERLINK - ALABAMA, LLC - AL 476      
256-674 2 Valley Head AL   476F CORETEL ALABAMA, INC. - AL 476      
256-674 3 Valley Head AL BRHMALXSGT2  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 476      
256-674 4 Valley Head AL BRHMALMT32Z  604E ONVOY, LLC - AL 476      
256-674 5 Valley Head AL BRHMALMT32Z  604E ONVOY, LLC - AL 476      
256-674 6 Valley Head AL   476F CORETEL ALABAMA, INC. - AL 476      
256-674 7 Valley Head AL   476F CORETEL ALABAMA, INC. - AL 476      
256-674 8 Valley Head AL BRHMALMT32Z  604E ONVOY, LLC - AL 476      
256-674 9 Valley Head AL BRHMALMT32Z  604E ONVOY, LLC - AL 476      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.