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.

NPA: 641 [Rate centres in NPA 641] [Dial plan for NPA 641]

NXX: 270

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
641-270 A Cincinnati IA KNVLIAXCPMD  624H ONVOY SPECTRUM, LLC 632   2024-07-02   
641-270 0 Cincinnati IA KNVLIAXCPMD  624H ONVOY SPECTRUM, LLC 632   2024-07-02   
641-270 1 Cincinnati IA   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 632   2025-11-14   

Last updated: Sat, 02 May 2026 12:20:53 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.