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: GRTNSDXADS0

Remotes:

Switch Switch name Switch type
ABRDSD01RL0  ABERDEEN  DLU 
ANDVSDXARS0  ANDOVER  DLU 
BRSTSDXARS1  BRISTOL  DLU 
CLMASDXARS0  COLUMBIA  DLU 
CLMTSDXARS0  CLAREMONT  DLU 
CONDSDXARS0  CONDE  DLU 
DOLDSDXARS3  DOLAND  DLU 
FRDRSDXARS3  FREDERICK  DLU 
FRNYSDXARS0  FERNEY  DLU 
HECLSDXARS3  HECLA  DLU 
HGTNSDXARS0  HOUGHTON  DLU 
MLLTSDXARS3  MELLETTE  DLU 
RDFDSDAHRS0  REDFIELD  RS 
TRTNSDXARS0  TURTON  DLU 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
605-397 A Groton SD 1664 JAMES VALLEY COOPERATIVE TELEPHONE COMPANY 640      

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

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