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: 319 [Rate centres in NPA 319] [Dial plan for NPA 319]

NXX: 406

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
319-406 A Denver IA CDRRIAAB4MD  7421 AT&T - LOCAL 635      
319-406 0 Denver IA   593K MCC TELEPHONY LLC 635      
319-406 1 Denver IA CDRRIAAB4MD  7421 AT&T - LOCAL 635      
319-406 2 Denver IA CDRRIADTNMD  985E BANDWIDTH.COM CLEC, LLC - IA 635      
319-406 3 Denver IA CDRRIADTKMD  221F ONVOY, LLC - IA 635      
319-406 4 Denver IA IWCYIA701MD  073H TELNYX LLC 635      
319-406 5 Denver IA CDRRIADTKMD  221F ONVOY, LLC - IA 635      
319-406 6 Denver IA CDRRIADTKMD  221F ONVOY, LLC - IA 635      
319-406 7 Denver IA CDRRIADTKMD  221F ONVOY, LLC - IA 635      
319-406 8 Denver IA MNTIIAAKDS0  544H INTEGRATED PATH COMMUNCATIONS, LLC - IA 635      
319-406 9 Denver IA CDRRIADTKMD  221F ONVOY, LLC - IA 635      

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.