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.

Mexican Hat, UT

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
435-280 A WVCYUT14DS1  871E ONVOY, LLC - UT 660      
435-280 0 BLNGUT070MD  832J E. FIBER SAN JUAN, LLC 660   2022-01-26   
435-280 2 WVCYUT14DS1  871E ONVOY, LLC - UT 660   2021-06-17   
435-280 4 WVCYUT14DS1  871E ONVOY, LLC - UT 660   2019-03-24   
435-280 8 WVCYUT14DS1  871E ONVOY, LLC - UT 660   2021-12-10   
435-683 A MXHTUTXCRL0  4429 CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT 660      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.