Local Calling Guide

Area code/prefix search

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Sundance, WY

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
307-281 A CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-281 0 CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-281 1 CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-281 2 CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-281 5   145J TERRA NOVA TELECOM INC. 654   2025-07-14   
307-281 6 CSPRWYMAXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 654   2010-11-13   
307-281 7 CHYNWYMAEMD  9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654   2023-03-04   
307-282 A CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-282 0 CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-283 A SNDNWYXCRS0  2251 RANGE TEL COOP INC 654      
307-290 A CSPRWYMAXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 654      
307-290 0 CSPRWYMAXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 654      
307-290 1 CSPRWYMAXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 654      
307-290 2 CSPRWYMAXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 654      
307-290 4 CHYNWYRF6MD  145J TERRA NOVA TELECOM INC. 654   2026-03-16   
307-790 A CHYNWYMAXZX  013B UNION TELEPHONE COMPANY 654      

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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