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.

Switch: MSCYIATCX0X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
641-426 1 Charles City IA 3620 OMNITEL COMMUNICATIONS, INC. - IA 632   2017-04-13   
641-552 A Charles City IA 3620 OMNITEL COMMUNICATIONS, INC. - IA 632      
641-552 5 Charles City IA 3620 OMNITEL COMMUNICATIONS, INC. - IA 632   2007-08-02   
641-552 8 Charles City IA 3620 OMNITEL COMMUNICATIONS, INC. - IA 632   2016-03-31   
641-552 9 Charles City IA 3620 OMNITEL COMMUNICATIONS, INC. - IA 632   2016-03-31   
641-631 A Charles City IA 3620 OMNITEL COMMUNICATIONS, INC. - IA 632      
641-631 1 Charles City IA 3620 OMNITEL COMMUNICATIONS, INC. - IA 632   2018-01-27   
641-631 2 Charles City IA 3620 OMNITEL COMMUNICATIONS, INC. - IA 632   2018-01-27   
641-631 3 Charles City IA 3620 OMNITEL COMMUNICATIONS, INC. - IA 632   2018-01-27   
641-631 4 Charles City IA 3620 OMNITEL COMMUNICATIONS, INC. - IA 632   2018-01-27   
641-631 5 Charles City IA 3620 OMNITEL COMMUNICATIONS, INC. - IA 632   2018-01-27   
641-715 0 Charles City IA 3620 OMNITEL COMMUNICATIONS, INC. - IA 632   2006-04-07   
641-715 3 Charles City IA 3620 OMNITEL COMMUNICATIONS, INC. - IA 632   2006-12-16   
641-715 8 Charles City IA 3620 OMNITEL COMMUNICATIONS, INC. - IA 632   2017-04-13   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.