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.

Conrad, IA

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
641-366 A UNINIAXODS1  1297 HEART OF IOWA COMMUNICATIONS COOPERATIVE - IA 632      
641-366 0 DESMIAITX1X  751F MCC TELEPHONY OF IOWA, LLC - IA 632   2010-05-06   
641-366 1 UNINIAXODS1  1297 HEART OF IOWA COMMUNICATIONS COOPERATIVE - IA 632      
641-366 2 UNINIAXODS1  1297 HEART OF IOWA COMMUNICATIONS COOPERATIVE - IA 632      
641-366 3 UNINIAXODS1  1297 HEART OF IOWA COMMUNICATIONS COOPERATIVE - IA 632      
641-366 4 UNINIAXODS1  1297 HEART OF IOWA COMMUNICATIONS COOPERATIVE - IA 632      
641-366 6 BOONIA01DS1  544H INTEGRATED PATH COMMUNCATIONS, LLC - IA 632   2018-05-14   
641-366 7 DESMIADT1MD  9877 LEVEL 3 COMMUNICATIONS, LLC - IA 632   2023-12-07   
641-366 8 DESMIADTXKX  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 632   2021-12-01   
641-366 9 UNINIAXODS1  1297 HEART OF IOWA COMMUNICATIONS COOPERATIVE - IA 632      
641-922 A UNINIAXODS1  1297 HEART OF IOWA COMMUNICATIONS COOPERATIVE - IA 632      

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.