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: MAY TXXARS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
254-259 A May TX 1181 VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 552      

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.