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: 456

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
307-456 A Big Piney WY BGPNWYXC7MD  450F ONVOY, LLC - WY 654      
307-456 0 Big Piney WY   450F ONVOY, LLC - WY 654   2021-07-10   
307-456 1 Big Piney WY   450F ONVOY, LLC - WY 654   2023-06-18   
307-456 2 Big Piney WY   450F ONVOY, LLC - WY 654   2022-10-28   
307-456 3 Big Piney WY   9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654   2023-01-27   
307-456 4 Big Piney WY   450F ONVOY, LLC - WY 654   2020-09-05   
307-456 5 Big Piney WY   450F ONVOY, LLC - WY 654   2020-12-19   
307-456 6 Big Piney WY   450F ONVOY, LLC - WY 654   2020-12-19   
307-456 7 Big Piney WY   450F ONVOY, LLC - WY 654   2019-09-21   
307-456 8 Big Piney WY   6010 NEW CINGULAR WIRELESS PCS, LLC 654   2020-09-21   
307-456 9 Big Piney WY   6010 NEW CINGULAR WIRELESS PCS, LLC 654   2020-09-21   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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