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.

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
307-293 A Guernsey WY 450F ONVOY, LLC - WY 646      
307-295 A Torrington WY 450F ONVOY, LLC - WY 646      
307-420 A Lingle WY 450F ONVOY, LLC - WY 646      
308-291 A Gering NE 549E ONVOY, LLC - NE 646      
308-310 A Scottsbluff NE 549E ONVOY, LLC - NE 646      
308-354 A Lewellen NE 549E ONVOY, LLC - NE 646      
308-401 A Lyman NE 549E ONVOY, LLC - NE 646      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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