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: 512

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
251-512 A Coffeeville AL MOBLALAZX6Z  604E ONVOY, LLC - AL 480      
251-512 0 Coffeeville AL   073H TELNYX LLC 480   2020-05-01   
251-512 1 Coffeeville AL   604E ONVOY, LLC - AL 480   2020-07-10   
251-512 2 Coffeeville AL   604E ONVOY, LLC - AL 480   2019-12-14   
251-512 3 Coffeeville AL   604E ONVOY, LLC - AL 480   2020-11-19   
251-512 4 Coffeeville AL   604E ONVOY, LLC - AL 480   2020-11-19   
251-512 5 Coffeeville AL   604E ONVOY, LLC - AL 480   2019-12-14   
251-512 6 Coffeeville AL   604E ONVOY, LLC - AL 480   2023-07-21   
251-512 7 Coffeeville AL   604E ONVOY, LLC - AL 480   2021-03-26   
251-512 8 Coffeeville AL   604E ONVOY, LLC - AL 480   2020-07-10   
251-512 9 Coffeeville AL   624H ONVOY SPECTRUM, LLC 480   2020-09-05   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.