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.
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Switch: MTCLTXXAPS0

Remotes:

Switch Switch name Switch type
DWSNTXXARP0  DAWSON  RP 
DWSNTXXARS0  DAWSON  DCL 
MTCLTXXARP0  MOUNT CALM  DCN 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
254-637 A Mount Calm TX 1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 556      
254-637 9 Mount Calm TX 1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 556   2015-09-07   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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