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: THDLORXADS0

Remotes:

Switch Switch name Switch type
ARTNORXARS0  ARLINGTON  RSC 
CSLCORXARS0  CASCADE LOCKS  RLC 
DLPTWAACRS1  DALLESPORT  RS 
GLDLWAXARS0  GOLDENDALE  RSC 
GLWDWAXARS0  GLENWOOD  RLC 
GRVYORXARS0  GRASS VALLEY  RLC 
HDRVORXARS1  HOOD RIVER  RSC 
KLCTWAXXRS0  KLICKITAT  RLC 
LYLEWAXARS0  LYLE  RLC 
MOROORXARS0  MORO  RSC 
MOSRORXXRS0  MOSIER  RLC 
ODLLORXXRS0  ODELL  RLC 
PRDLORXXRS0  PARKDALE  RLC 
RSVTWAXARS0  ROOSEVELT  RSC 
RUFSORXARS0  RUFUS  RSC 
STSNWAXARS1  STEVENSON  RS 
TRLKWAXXRS0  TROUT LAKE  RLC 
WASCORXARS0  WASCO  RSC 
WHSLWAXXRS0  WHITE SALMON  RLC 
WLRDWAXXRS0  WILLARD  RLC 
WSHRWAXARS0  WISHRAM  RLC 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
541-296 A The Dalles OR 4520 UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 672      
541-298 A The Dalles OR 4520 UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 672      
541-506 A The Dalles OR 4520 UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 672      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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