Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 641 [Rate centres in NPA 641] [Dial plan for NPA 641]

NXX: 321

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
641-321 A Mount Ayr IA DESMIADTXJX  508J CENTURYLINK COMMUNICATIONS, LLC 632      
641-321 0 Mount Ayr IA   6570 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 632   2020-10-20   
641-321 1 Mount Ayr IA   544H INTEGRATED PATH COMMUNCATIONS, LLC - IA 632   2018-05-15   
641-321 2 Mount Ayr IA   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 632   2018-04-02   
641-321 3 Mount Ayr IA   221F ONVOY, LLC - IA 632   2019-11-29   
641-321 4 Mount Ayr IA   9877 LEVEL 3 COMMUNICATIONS, LLC - IA 632   2022-02-18   
641-321 5 Mount Ayr IA   624H ONVOY SPECTRUM, LLC 632   2024-03-09   
641-321 6 Mount Ayr IA   221F ONVOY, LLC - IA 632   2020-08-10   
641-321 7 Mount Ayr IA   508J CENTURYLINK COMMUNICATIONS, LLC 632   2018-02-02   
641-321 9 Mount Ayr IA   6266 UNITED STATES CELLULAR - IA 632   2021-10-09   

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

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