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.

Knox City, TX

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
940-316 A KNCYTXXAPS0  1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 548      
940-316 1 SYMRTXXA0MD  0132 AMA COMM., LLC DBA AMA*TECHTEL COMMUNICATIONS-TX 548   2019-07-14   
940-316 6   7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 548   2022-05-20   
940-316 9 KNCYTXXAPS0  1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 548   2016-10-06   
940-657 A SYMRTX01DS0  4046 SANTA ROSA TELEPHONE COOPERATIVE, INC. 548      
940-658 A KNCYTXXADS0  1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 548      

Last updated: Thu, 04 Aug 2022 23:14:42 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.