Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
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NPA: 641 [Rate centres in NPA 641] [Dial plan for NPA 641]

NXX: 221

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
641-221 A Greenfield IA CNVLIABC1MD  6266 UNITED STATES CELLULAR - IA 632      
641-221 0 Greenfield IA CNVLIABC1MD  6266 UNITED STATES CELLULAR - IA 632      
641-221 1 Greenfield IA CNVLIABC1MD  6266 UNITED STATES CELLULAR - IA 632      
641-221 2 Greenfield IA KNVLIAXCSMD  221F ONVOY, LLC - IA 632      
641-221 4 Greenfield IA KNVLIAXCSMD  221F ONVOY, LLC - IA 632      
641-221 6 Greenfield IA DESMIAITGT5  444G AUREON COMMUNICATIONS, LLC 632      
641-221 9 Greenfield IA KNVLIAXC1MD  751F MCC TELEPHONY OF IOWA, LLC - IA 632      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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