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.

Switch: BRYNTX01YMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
979-280 3 Hearne TX 516C AT&T CORP. 570   2025-10-06   
979-368 A Calvert TX 516C AT&T CORP. 570   2025-08-22   
979-368 7 Calvert TX 516C AT&T CORP. 570   2025-08-22   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.