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: 438

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
720-438 A Longmont CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
720-438 0 Longmont CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2009-08-31   
720-438 1 Longmont CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2009-12-04   
720-438 2 Longmont CO DNVRCOETPS0  3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656   2009-01-22   
720-438 3 Longmont CO ENWDCO47DS3  8980 XO COLORADO, LLC 656   2007-11-08   
720-438 4 Longmont CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2007-04-30   
720-438 5 Longmont CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2008-08-20   
720-438 6 Longmont CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2009-07-16   
720-438 7 Longmont CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2006-11-24   
720-438 8 Longmont CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2009-07-03   
720-438 9 Longmont CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - 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.