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: CRRLIABUDS0

Remotes:

Switch Switch name Switch type
BREDIAXORS0  BREDA  RS 
DESNIABPRS0  DENISON  S70 
FRGTIAXORS0  FARRAGUT  RS 
GLWDIA08RS0  GLENWOOD  RS 
LDDLIAXORS0  LIDDERDALE  RS 
MCDNIAXORS0  MACEDONIA  RS 
WSSDIAXORS0  WESTSIDE  RS 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
712-770 A Glidden IA 156C BTC, INC. - IA 644      
712-775 A Carroll IA 156C BTC, INC. - IA 644      

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

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