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: 513

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
641-513 A Mason City IA DESMIADTFMD  221F ONVOY, LLC - IA 632   2024-05-03   
641-513 0 Mason City IA   221F ONVOY, LLC - IA 632   2024-05-03   
641-513 1 Mason City IA   221F ONVOY, LLC - IA 632   2024-05-03   
641-513 2 Mason City IA   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 632   2024-12-07   
641-513 3 Mason City IA   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 632   2026-01-17   
641-513 8 Mason City IA   068H NORTHLAND COMMUNICATIONS, INC. - IA 632   2024-05-04   
641-513 9 Mason City IA   515J IP HORIZON LLC 632   2025-09-26   

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

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