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: 871

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
720-871 A Longmont CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-871 0 Longmont CO   278F PEERLESS NETWORK OF COLORADO, LLC - CO 656   2022-03-19   
720-871 1 Longmont CO   6529 T-MOBILE USA, INC. 656   2022-03-11   
720-871 2 Longmont CO   6529 T-MOBILE USA, INC. 656   2022-03-11   
720-871 3 Longmont CO   6529 T-MOBILE USA, INC. 656   2022-03-11   
720-871 4 Longmont CO   624H ONVOY SPECTRUM, LLC 656   2022-01-21   
720-871 5 Longmont CO   624H ONVOY SPECTRUM, LLC 656   2022-01-21   
720-871 6 Longmont CO   624H ONVOY SPECTRUM, LLC 656   2022-01-21   
720-871 7 Longmont CO   6529 T-MOBILE USA, INC. 656   2022-01-20   
720-871 8 Longmont CO   6529 T-MOBILE USA, INC. 656   2022-01-20   
720-871 9 Longmont CO   6529 T-MOBILE USA, INC. 656   2022-01-20   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.