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: CDMLTXXADS0

Remotes:

Switch Switch name Switch type
JSPHTXXARS0  JOSEPHINE  DLM 
MRITTXXARS0  MERIT  DLM 
NEVDTXXARS0  NEVADA  DLM 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
903-527 A Caddo Mills TX 2154 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.