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: 579

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
256-579 A Fruithurst AL TLLPGAES57F  9417 BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 438      
256-579 0 Fruithurst AL ATLNGAQSDS8  604E ONVOY, LLC - AL 438   2016-03-21   
256-579 1 Fruithurst AL ATLNGAQSDS8  604E ONVOY, LLC - AL 438   2016-03-21   
256-579 2 Fruithurst AL TLLPGAES57F  9417 BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 438      
256-579 3 Fruithurst AL ATLNGATLFMD  516C AT&T CORP. 438   2011-02-03   
256-579 4 Fruithurst AL   476F CORETEL ALABAMA, INC. - AL 438   2019-05-20   
256-579 5 Fruithurst AL   145J TERRA NOVA TELECOM INC. 438   2021-01-05   
256-579 6 Fruithurst AL ATLNGAQSDS8  604E ONVOY, LLC - AL 438   2018-07-05   
256-579 7 Fruithurst AL   476F CORETEL ALABAMA, INC. - AL 438   2019-05-20   
256-579 8 Fruithurst AL ATLNGABU05Z  624H ONVOY SPECTRUM, LLC 438   2020-11-02   
256-579 9 Fruithurst AL   476F CORETEL ALABAMA, INC. - AL 438   2019-05-20   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.