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: 281 [Rate centres in NPA 281] [Dial plan for NPA 281]

NXX: 317

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
281-317 A Friendswood TX   903C ONVOY, LLC - TX 560   2025-04-18   
281-317 0 Friendswood TX   004F BANDWIDTH.COM CLEC, LLC - TX 560   2010-03-11   
281-317 1 Friendswood TX   903C ONVOY, LLC - TX 560   2025-10-26   
281-317 2 Friendswood TX   903C ONVOY, LLC - TX 560   2020-11-30   
281-317 3 Friendswood TX   903C ONVOY, LLC - TX 560   2020-11-30   
281-317 4 Friendswood TX   903C ONVOY, LLC - TX 560   2020-11-30   
281-317 5 Friendswood TX   624H ONVOY SPECTRUM, LLC 560   2021-11-05   
281-317 6 Friendswood TX   903C ONVOY, LLC - TX 560   2020-09-30   
281-317 7 Friendswood TX   004F BANDWIDTH.COM CLEC, LLC - TX 560   2010-03-11   
281-317 8 Friendswood TX   903C ONVOY, LLC - TX 560   2003-10-01   
281-317 9 Friendswood TX   624H ONVOY SPECTRUM, LLC 560   2021-11-05   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.