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: 997

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
641-997 A Ottumwa IA CNVLIABC1MD  6266 UNITED STATES CELLULAR - IA 632   2025-01-05   
641-997 0 Ottumwa IA   6266 UNITED STATES CELLULAR - IA 632   2025-01-05   
641-997 1 Ottumwa IA   6266 UNITED STATES CELLULAR - IA 632   2025-01-05   
641-997 2 Ottumwa IA   6266 UNITED STATES CELLULAR - IA 632   2025-01-05   
641-997 3 Ottumwa IA   6266 UNITED STATES CELLULAR - IA 632   2025-01-05   
641-997 4 Ottumwa IA   6266 UNITED STATES CELLULAR - IA 632   2025-01-05   
641-997 5 Ottumwa IA   624H ONVOY SPECTRUM, LLC 632   2025-01-06   
641-997 9 Ottumwa IA   6570 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 632   2025-08-25   

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

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