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: 303 [Rate centres in NPA 303] [Dial plan for NPA 303]

NXX: 953

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
303-953 A Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-953 0 Denver CO DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656      
303-953 1 Denver CO DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656      
303-953 2 Denver CO DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656      
303-953 3 Denver CO DNVRCOETPS0  3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
303-953 4 Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-953 5 Denver CO DNVRCOETPS0  3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
303-953 6 Denver CO DNVRCOETPS0  3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
303-953 7 Denver CO DNVRCOETPS0  3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
303-953 8 Denver CO DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656      
303-953 9 Denver CO DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.