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.

Marshalltown, IA

<< 1 2

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
641-854 A MRTWIASODS0  9631 QWEST CORPORATION 632      
641-854 0   985E BANDWIDTH.COM CLEC, LLC - IA 632   2015-06-29   
641-854 1   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 632   2017-08-25   
641-854 2   221F ONVOY, LLC - IA 632   2016-07-18   
641-854 3   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 632   2016-07-07   
641-854 4   6529 T-MOBILE USA, INC. 632   2018-04-02   
641-854 5   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 632   2017-10-02   
641-854 6   9631 QWEST CORPORATION 632   2015-04-08   
641-854 7   9631 QWEST CORPORATION 632   2015-04-08   
641-854 8   9631 QWEST CORPORATION 632   2015-04-08   
641-854 9   6529 T-MOBILE USA, INC. 632   2018-04-02   

<< 1 2

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.