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: CRLBNMXADS1

Remotes:

Switch Switch name Switch type
CBCVNMXARS1  CARLSBAD CAVERNS  RCU 
LVNGNMXARS1  LOVING  RCU 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
575-234 A Carlsbad NM 1164 VALOR TELECOM TX,LP-NM #1 DBA WINDSTREAM COMM SW 664      
575-236 A Carlsbad NM 1164 VALOR TELECOM TX,LP-NM #1 DBA WINDSTREAM COMM SW 664      
575-628 A Carlsbad NM 1164 VALOR TELECOM TX,LP-NM #1 DBA WINDSTREAM COMM SW 664      
575-885 A Carlsbad NM 1164 VALOR TELECOM TX,LP-NM #1 DBA WINDSTREAM COMM SW 664      
575-887 A Carlsbad NM 1164 VALOR TELECOM TX,LP-NM #1 DBA WINDSTREAM COMM SW 664      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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