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: 271

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
641-271 A Clearfield IA KNVLIAXCPMD  624H ONVOY SPECTRUM, LLC 632   2024-07-02   
641-271 0 Clearfield IA   624H ONVOY SPECTRUM, LLC 632   2024-07-02   
641-271 1 Clearfield IA   6570 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 632   2024-10-25   

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

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