Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 720 [Rate centres in NPA 720] [Dial plan for NPA 720]

NXX: 343

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
720-343 A Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-343 0 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2007-08-10   
720-343 1 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2006-01-31   
720-343 2 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2006-01-31   
720-343 3 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2006-01-31   
720-343 4 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2006-01-31   
720-343 5 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2006-01-31   
720-343 6 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2007-05-31   
720-343 7 Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2003-12-22   
720-343 8 Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2003-12-22   
720-343 9 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2007-08-10   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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