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: 990

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
641-990 A Grinnell IA CNVLIABC1MD  6266 UNITED STATES CELLULAR - IA 632      
641-990 0 Grinnell IA   6266 UNITED STATES CELLULAR - IA 632      
641-990 1 Grinnell IA   6266 UNITED STATES CELLULAR - IA 632      
641-990 2 Grinnell IA   6266 UNITED STATES CELLULAR - IA 632      
641-990 3 Grinnell IA   6266 UNITED STATES CELLULAR - IA 632      
641-990 4 Grinnell IA   6266 UNITED STATES CELLULAR - IA 632      
641-990 5 Grinnell IA   6266 UNITED STATES CELLULAR - IA 632      
641-990 6 Grinnell IA   6266 UNITED STATES CELLULAR - IA 632      
641-990 7 Grinnell IA   6266 UNITED STATES CELLULAR - IA 632      
641-990 8 Grinnell IA   6266 UNITED STATES CELLULAR - IA 632   2003-06-24   
641-990 9 Grinnell IA   6266 UNITED STATES CELLULAR - IA 632   2004-02-10   

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

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