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.

Switch: GRNSWYXCRP0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
307-836 A Guernsey WY 4531 UNITED TEL CO WEST - WY DBA CENTURYLINK WEST - WY 646      
307-836 0 Guernsey WY 4531 UNITED TEL CO WEST - WY DBA CENTURYLINK WEST - WY 646      
307-836 1 Guernsey WY 4531 UNITED TEL CO WEST - WY DBA CENTURYLINK WEST - WY 646      
307-836 2 Guernsey WY 4531 UNITED TEL CO WEST - WY DBA CENTURYLINK WEST - WY 646      
307-836 3 Guernsey WY 4531 UNITED TEL CO WEST - WY DBA CENTURYLINK WEST - WY 646      
307-836 4 Guernsey WY 4531 UNITED TEL CO WEST - WY DBA CENTURYLINK WEST - WY 646      
307-836 5 Guernsey WY 4531 UNITED TEL CO WEST - WY DBA CENTURYLINK WEST - WY 646      
307-836 6 Guernsey WY 4531 UNITED TEL CO WEST - WY DBA CENTURYLINK WEST - WY 646      
307-836 7 Guernsey WY 4531 UNITED TEL CO WEST - WY DBA CENTURYLINK WEST - WY 646      
307-836 9 Guernsey WY 4531 UNITED TEL CO WEST - WY DBA CENTURYLINK WEST - WY 646      

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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