Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 307 [Rate centres in NPA 307] [Dial plan for NPA 307]

NXX: 452

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
307-452 A Casper WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2024-07-21   
307-452 0 Casper WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2024-07-21   
307-452 1 Casper WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2024-07-21   
307-452 2 Casper WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2024-07-21   
307-452 4 Casper WY   450F ONVOY, LLC - WY 654   2025-05-02   
307-452 5 Casper WY CHYNWYMAEMD  9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654   2024-07-22   
307-452 6 Casper WY   450F ONVOY, LLC - WY 654   2025-05-02   
307-452 7 Casper WY CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654   2024-12-02   
307-452 8 Casper WY CHYNWYJLAMD  732J NUSO, LLC 654   2024-12-01   
307-452 9 Casper WY CHYNWYJLAMD  732J NUSO, LLC 654   2024-12-01   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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