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: 659

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
641-659 A Grinnell IA GRNLIAXCPS0  1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 632      
641-659 4 Grinnell IA GRNLIAXCPMD  221F ONVOY, LLC - IA 632   2021-08-30   
641-659 5 Grinnell IA GRNLIAXCPMD  221F ONVOY, LLC - IA 632   2021-08-30   
641-659 6 Grinnell IA OSKLIA14DS0  916A MAHASKA COMMUNICATION GROUP, LLC - IA 632   2021-03-26   
641-659 7 Grinnell IA DESMIADT1MD  9877 LEVEL 3 COMMUNICATIONS, LLC - IA 632   2022-02-18   
641-659 8 Grinnell IA GRNLIAXCMMD  624H ONVOY SPECTRUM, LLC 632   2024-03-08   
641-659 9 Grinnell IA GRNLIAXCPS0  1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 632   2015-08-21   

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

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