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: 983 [Rate centres in NPA 983] [Dial plan for NPA 983]

NXX: 777

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
983-777 A Denver CO DNVRCO26XBY  557H WIDE VOICE, LLC - CO 656      
983-777 0 Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2024-01-07   
983-777 1 Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2024-01-07   
983-777 2 Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2024-01-07   
983-777 3 Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2024-01-07   
983-777 4 Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2024-01-07   
983-777 5 Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2024-01-07   
983-777 6 Denver CO DNVRCOMA53Z  732J NUSO, LLC 656   2023-12-28   
983-777 7 Denver CO DNVRCOMA22Z  557H WIDE VOICE, LLC - CO 656   2023-12-04   
983-777 8 Denver CO DNVRCOMA32Z  321J HD CARRIER LLC 656   2023-12-04   
983-777 9 Denver CO DNVRCO2669Z  490J DISH WIRELESS, LLC 656   2023-12-22   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.