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: 901

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
251-901 A Mobile AL MOBLALAZ13Z  624H ONVOY SPECTRUM, LLC 480      
251-901 0 Mobile AL MOBLALIHG02  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 480   2021-07-23   
251-901 1 Mobile AL MOBLALAZX6Z  604E ONVOY, LLC - AL 480   2021-07-02   
251-901 2 Mobile AL MOBLALAZX6Z  604E ONVOY, LLC - AL 480   2021-07-02   
251-901 3 Mobile AL MOBLALAZX6Z  604E ONVOY, LLC - AL 480   2021-07-02   
251-901 4 Mobile AL MOBLALAZX6Z  604E ONVOY, LLC - AL 480   2021-07-02   
251-901 5 Mobile AL MOBLALAZX6Z  604E ONVOY, LLC - AL 480   2021-07-02   
251-901 6 Mobile AL MOBLALIHG02  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 480   2021-07-23   
251-901 7 Mobile AL MOBLALIHG02  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 480   2021-07-23   
251-901 8 Mobile AL MOBLALIHG02  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 480   2021-07-23   
251-901 9 Mobile AL MOBLALAZ13Z  624H ONVOY SPECTRUM, LLC 480   2021-06-14   

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.