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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 641 [Rate centres in NPA 641] [Dial plan for NPA 641]

NXX: 921

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
641-921 A Green Mountain IA DESMIAITX1X  751F MCC TELEPHONY OF IOWA, LLC - IA 632      
641-921 1 Green Mountain IA DESMIAITX1X  751F MCC TELEPHONY OF IOWA, LLC - IA 632      
641-921 2 Green Mountain IA BOONIA01DS1  544H INTEGRATED PATH COMMUNCATIONS, LLC - IA 632      

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.