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: DNVRCOMA31Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
720-764 8 Hudson CO 710A ALLO COMMUNICATIONS, LLC - NE 656   2021-04-15   
970-503 A Greeley CO 710A ALLO COMMUNICATIONS, LLC - NE 656      
970-503 5 Greeley CO 710A ALLO COMMUNICATIONS, LLC - NE 656   2021-05-02   
970-743 A Fort Morgan CO 710A ALLO COMMUNICATIONS, LLC - NE 656      
970-743 3 Fort Morgan CO 710A ALLO COMMUNICATIONS, LLC - NE 656   2018-10-14   
970-771 4 Breckenridge CO 710A ALLO COMMUNICATIONS, LLC - NE 656   2019-06-24   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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