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.

West Lyman, WY

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
307-788 A LYMNNEXURP0  4531 UNITED TEL CO WEST - WY DBA CENTURYLINK WEST - WY 646      
307-788 0 LYMNNEXURP0  4531 UNITED TEL CO WEST - WY DBA CENTURYLINK WEST - WY 646      
307-788 1 LYMNNEXURP0  4531 UNITED TEL CO WEST - WY DBA CENTURYLINK WEST - WY 646      
307-788 2 SCTSNEXUMMD  450F ONVOY, LLC - WY 646   2021-04-21   
307-788 4 SCTSNEXUMMD  450F ONVOY, LLC - WY 646   2021-07-11   
307-788 5 GDISNENW6MD  9416 LEVEL 3 COMMUNICATIONS, LLC - WY 646   2023-01-27   
307-788 6 SCTSNEXUMMD  450F ONVOY, LLC - WY 646   2023-06-18   
307-788 7 SCTSNEXUMMD  450F ONVOY, LLC - WY 646   2021-03-01   
307-788 8 GDISNENWUMD  508J CENTURYLINK COMMUNICATIONS, LLC 646   2015-01-17   
307-788 9 LYMNNEXURP0  4531 UNITED TEL CO WEST - WY DBA CENTURYLINK WEST - WY 646      

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.