Local Calling Guide

Area code/prefix search

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

NXX: 666

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
641-666 A Osage IA DESMIADTFMD  221F ONVOY, LLC - IA 632      
641-666 0 Osage IA   6529 T-MOBILE USA, INC. 632   2018-04-02   
641-666 1 Osage IA   6529 T-MOBILE USA, INC. 632   2018-04-02   
641-666 2 Osage IA   985E BANDWIDTH.COM CLEC, LLC - IA 632   2018-06-08   
641-666 3 Osage IA   221F ONVOY, LLC - IA 632   2019-09-20   
641-666 4 Osage IA   544H INTEGRATED PATH COMMUNCATIONS, LLC - IA 632   2018-05-15   
641-666 5 Osage IA   5562 METROPCS, INC. 632   2018-07-12   
641-666 6 Osage IA   221F ONVOY, LLC - IA 632   2018-02-03   
641-666 7 Osage IA   508J CENTURYLINK COMMUNICATIONS, LLC 632   2018-02-05   
641-666 8 Osage IA   145J TERRA NOVA TELECOM INC. 632   2024-02-14   

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

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