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: SPNCIASODS0

Remotes:

Switch Switch name Switch type
AYRSIAXORS0  AYRSHIRE  RS 
GRTGIAXORS0  GRAETTINGER  RS 
LNRKIAXORS0  LONE ROCK  RS 
PLMRIAXORS0  PALMER  RS 
PLVRIAXORS0  PLOVER  RS 
RNGSIAXORS0  RINGSTED  RS 
ROYLIAXORS0  ROYAL  RS 
RTHVIAXORS0  RUTHVEN  RS 
SPRRIAXORS0  SUPERIOR  RS 
TRRLIAXORS0  TERRIL  RS 
WBNDIAXORS0  WEST BEND  RS 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date

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

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