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: 356

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
251-356 A Finchburg AL MOBLALAZ18Z  965H FRACTEL, LLC 480      
251-356 0 Finchburg AL MOBLALAZ11Z  073H TELNYX LLC 480   2020-05-01   
251-356 1 Finchburg AL ATMRALXAXMD  604E ONVOY, LLC - AL 480   2020-07-10   
251-356 2 Finchburg AL ATMRALXAXMD  604E ONVOY, LLC - AL 480   2020-11-28   
251-356 3 Finchburg AL ATMRALXAXMD  604E ONVOY, LLC - AL 480   2021-02-17   
251-356 4 Finchburg AL ATMRALXAXMD  604E ONVOY, LLC - AL 480   2021-02-17   
251-356 5 Finchburg AL ATMRALXAXMD  604E ONVOY, LLC - AL 480   2022-03-25   
251-356 6 Finchburg AL ATMRALXANMD  624H ONVOY SPECTRUM, LLC 480   2022-02-19   
251-356 7 Finchburg AL MOBLALAZ18Z  965H FRACTEL, LLC 480   2020-01-28   
251-356 8 Finchburg AL ATMRALXANMD  624H ONVOY SPECTRUM, LLC 480   2020-09-04   
251-356 9 Finchburg AL MOBLALAZ18Z  965H FRACTEL, LLC 480   2020-01-28   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.