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.

St Charles, IA

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
641-396 A STMYIAXODS1  1209 FMTC-I35, INC. D/B/A OMNITEL COMMUNICATIONS 632      
641-916 A DESMIADTXKX  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 632      
641-916 6   490J DISH WIRELESS, LLC 632   2023-05-02   
641-916 9   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 632   2022-01-17   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.