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.

Switch: DNVRCOETPS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
303-577 A Denver CO 3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
303-597 A Denver CO 3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
303-996 A Denver CO 3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
720-245 A Denver CO 3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
720-306 A Denver CO 3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
720-361 A Denver CO 3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
720-376 A Denver CO 3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
720-382 A Denver CO 3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
720-402 A Denver CO 3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
720-417 A Denver CO 3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
720-460 A Denver CO 3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
720-484 A Denver CO 3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
720-508 A Denver CO 3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
720-518 A Denver CO 3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
720-599 A Denver CO 3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
720-723 A Denver CO 3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
720-724 A Denver CO 3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
720-772 A Denver CO 3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
720-974 A Denver CO 3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
720-975 A Denver CO 3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
970-235 A Estes Park CO 3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
970-342 A Loveland CO 3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
970-449 A Fort Collins CO 3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
970-670 A Berthoud CO 3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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