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.

Colo, IA

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
641-377 A COLOIAXODS0  1134 COLO TEL. CO. 632      
641-377 0 COLOIAXODS0  1134 COLO TEL. CO. 632      
641-377 1 COLOIAXODS0  1134 COLO TEL. CO. 632      
641-377 2 COLOIAXODS0  1134 COLO TEL. CO. 632      
641-377 3 COLOIAXODS0  1134 COLO TEL. CO. 632      
641-377 4 COLOIAXODS0  1134 COLO TEL. CO. 632      
641-377 5 COLOIAXODS0  1134 COLO TEL. CO. 632      
641-377 6 DESMIAITX6X  6529 T-MOBILE USA, INC. 632   2006-09-07   
641-377 7 COLOIAXODS0  1134 COLO TEL. CO. 632      
641-377 8 COLOIAXODS0  1134 COLO TEL. CO. 632      
641-377 9 COLOIAXODS0  1134 COLO TEL. CO. 632      
641-808 A DESMIAITX6X  6529 T-MOBILE USA, INC. 632      
641-808 1 BOONIA01DS1  544H INTEGRATED PATH COMMUNCATIONS, LLC - IA 632   2018-05-14   
641-808 4 DESMIA72HMD  5562 METROPCS, INC. 632   2018-08-03   
641-808 8 DESMIAITX6X  6529 T-MOBILE USA, INC. 632   2018-04-20   
641-808 9 DESMIAITX6X  6529 T-MOBILE USA, INC. 632   2018-04-20   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.