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: KRNCTXXAPS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
430-975 A Karnack TX 1181 VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 554      
430-975 9 Karnack TX 1181 VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 554   2015-09-04   

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.