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: 720 [Rate centres in NPA 720] [Dial plan for NPA 720]

NXX: 641

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
720-641 A Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-641 0 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-641 1 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-641 2 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-641 3 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-641 4 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-641 5 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-641 6 Denver CO   5562 METROPCS, INC. 656      
720-641 7 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-641 8 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-641 9 Denver CO ENWDCO47DS4  320E YMAX COMMUNICATIONS CORP. - CO 656   2009-09-15   

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.