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: DNVTCOZIGMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
983-200 A Longmont CO 732J NUSO, LLC 656      
983-200 1 Longmont CO 732J NUSO, LLC 656   2023-05-29   
983-207 1 Longmont CO 732J NUSO, LLC 656   2024-11-03   
983-207 2 Longmont CO 732J NUSO, LLC 656   2024-11-03   
983-983 1 Longmont CO 732J NUSO, LLC 656   2023-12-28   
983-983 2 Longmont CO 732J NUSO, LLC 656   2023-12-28   

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

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