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: 494

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
641-494 A Mason City IA MSCYIATCDS0  9631 QWEST CORPORATION 632      
641-494 0 Mason City IA   9631 QWEST CORPORATION 632      
641-494 1 Mason City IA   9631 QWEST CORPORATION 632      
641-494 2 Mason City IA   9631 QWEST CORPORATION 632      
641-494 3 Mason City IA   9631 QWEST CORPORATION 632      
641-494 4 Mason City IA   6266 UNITED STATES CELLULAR - IA 632   2005-01-12   
641-494 5 Mason City IA   9631 QWEST CORPORATION 632      
641-494 6 Mason City IA   6266 UNITED STATES CELLULAR - IA 632   2005-01-12   
641-494 7 Mason City IA   6266 UNITED STATES CELLULAR - IA 632   2005-01-12   
641-494 8 Mason City IA   6266 UNITED STATES CELLULAR - IA 632   2005-01-12   
641-494 9 Mason City IA   6266 UNITED STATES CELLULAR - IA 632   2005-01-12   

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

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