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: 844

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
720-844 A Denver CO DNVRCO26XWX  616J LEAP TELECOM, LLC 656      
720-844 0 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2021-07-02   
720-844 1 Denver CO DNVRCO26XWX  616J LEAP TELECOM, LLC 656   2021-03-11   
720-844 2 Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2021-03-14   
720-844 3 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2021-07-02   
720-844 4 Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2021-03-29   
720-844 5 Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2021-03-29   
720-844 6 Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2021-05-09   
720-844 7 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2021-07-02   
720-844 8 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2021-07-02   
720-844 9 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2021-07-02   

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.