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: THDLORXADMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
458-200 A Cascade Locks OR 7531 TELEPORT COMMUNICATIONS AMERICA, LLC - OR 672      
509-772 A Goldendale WA 7146 TELEPORT COMMUNICATIONS AMERICA, LLC - WA 672      
541-807 A Union OR 7531 TELEPORT COMMUNICATIONS AMERICA, LLC - OR 672      
971-309 A Willamina OR 7531 TELEPORT COMMUNICATIONS AMERICA, LLC - OR 672      
971-370 A Silverton OR 7531 TELEPORT COMMUNICATIONS AMERICA, LLC - OR 672      
971-467 A Portland OR 7531 TELEPORT COMMUNICATIONS AMERICA, LLC - OR 672      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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