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.

Thompson, UT

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
435-285 A THSNUTXCRL1  4429 CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT 660      
435-345 A WVCYUT14DS1  871E ONVOY, LLC - UT 660      
435-345 4 WVCYUT14DS1  871E ONVOY, LLC - UT 660   2019-03-24   
435-345 5 WVCYUT14DS1  871E ONVOY, LLC - UT 660   2021-09-26   
435-345 6 WVCYUT14DS1  871E ONVOY, LLC - UT 660   2021-06-17   

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.