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: 251 [Rate centres in NPA 251] [Dial plan for NPA 251]

NXX: 436

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
251-436 A Mobile AL MOBLALAZDS0  9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 480      
251-436 0 Mobile AL   9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 480      
251-436 1 Mobile AL   072F BANDWIDTH.COM CLEC, LLC - AL 480   2012-03-16   
251-436 2 Mobile AL   9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 480      
251-436 3 Mobile AL   9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 480      
251-436 4 Mobile AL   9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 480      
251-436 5 Mobile AL   9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 480      
251-436 6 Mobile AL   9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 480      
251-436 7 Mobile AL   9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 480      
251-436 8 Mobile AL   9419 BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 480      
251-436 9 Mobile AL   6214 NEW CINGULAR WIRELESS PCS, LLC - GA 480   2016-02-05   

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.