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.

Sarles, ND

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
701-697 A LNGDNDXADS2  1636 UNITED TEL. MUTUAL AID CORP. 636      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.