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: DNVRCOMA47Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
303-243 A Denver CO 6874 N.E. COLORADO CELLULAR, INC. 656      
970-466 A Sterling CO 6874 N.E. COLORADO CELLULAR, INC. 656      
970-467 A Fort Morgan CO 6874 N.E. COLORADO CELLULAR, INC. 656      
970-520 A Sterling CO 6874 N.E. COLORADO CELLULAR, INC. 656      
970-554 A Akron CO 6874 N.E. COLORADO CELLULAR, INC. 656      
970-630 A Yuma CO 6874 N.E. COLORADO CELLULAR, INC. 656      
970-768 A Fort Morgan CO 6874 N.E. COLORADO CELLULAR, INC. 656      
970-961 A Yuma CO 6874 N.E. COLORADO CELLULAR, INC. 656   2025-01-27   

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

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