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: WTLDIAXODS0

Remotes:

Switch Switch name Switch type
CLMSIAXORS2  CALAMUS  RSC 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
563-246 A Calamus IA 1160 F&B COMMUNICATIONS, INC. 634      
563-374 A Wheatland IA 1160 F&B COMMUNICATIONS, INC. 634      
563-574 A Delmar IA 4245 F&B COMMUNICATIONS, INC. - IA 634      
563-890 A Bennett IA 4245 F&B COMMUNICATIONS, INC. - IA 634      
563-941 A Lowden IA 4245 F&B COMMUNICATIONS, INC. - IA 634      

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

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