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: CMNCTXXADS0

Remotes:

Switch Switch name Switch type
BLNKTXXARS0  BLANKET  1RE 
GUSTTXXARS0  GUSTINE  1RE 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
325-356 A Comanche TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 961      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.