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.
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Switch: SLKCUTMAXFY

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
385-285 A Salt Lake City UT 659H WIDE VOICE, LLC - UT 660      
385-285 1 Salt Lake City UT 659H WIDE VOICE, LLC - UT 660   2017-03-18   
385-440 3 Pleasant Grove UT 659H WIDE VOICE, LLC - UT 660   2018-01-28   
385-485 A Murray UT 659H WIDE VOICE, LLC - UT 660      
385-485 1 Murray UT 659H WIDE VOICE, LLC - UT 660   2017-04-24   
435-366 3 St George UT 659H WIDE VOICE, LLC - UT 660   2026-03-27   
435-366 4 St George UT 659H WIDE VOICE, LLC - UT 660   2026-03-27   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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