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: 553

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
720-553 A Denver CO AURRCOMADS0  9636 QWEST CORPORATION 656      
720-553 0 Denver CO   9636 QWEST CORPORATION 656   2012-07-22   
720-553 1 Denver CO   9636 QWEST CORPORATION 656   2012-07-22   
720-553 2 Denver CO   9636 QWEST CORPORATION 656   2012-07-22   
720-553 3 Denver CO   9636 QWEST CORPORATION 656   2012-07-22   
720-553 4 Denver CO   9636 QWEST CORPORATION 656   2012-07-22   
720-553 5 Denver CO   9636 QWEST CORPORATION 656   2012-07-22   
720-553 6 Denver CO   9636 QWEST CORPORATION 656   2012-07-22   
720-553 7 Denver CO   9636 QWEST CORPORATION 656   2012-07-22   
720-553 8 Denver CO   9636 QWEST CORPORATION 656   2012-07-22   
720-553 9 Denver CO   9636 QWEST CORPORATION 656   2012-07-22   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.