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.
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OCN: 6907 COMMUNICATIONS UNLIMITED

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
303-701 A Denver CO DNVRCOKFCM1  656      
303-836 A Denver CO DNVRCOKFCM1  656      
719-449 A Colorado Springs-Main CO CLSPCO11CM5  658      

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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