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: DWSNTXXARS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
254-578 A Dawson TX 1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 556      
254-578 0 Dawson TX 1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 556      
254-578 1 Dawson TX 1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 556      
254-578 2 Dawson TX 1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 556      
254-578 3 Dawson TX 1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 556      
254-578 4 Dawson TX 1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 556      
254-578 7 Dawson TX 1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 556      
254-578 8 Dawson TX 1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 556      
254-578 9 Dawson TX 1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 556      

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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