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: 218

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
307-218 A Sheridan WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654      
307-218 0 Sheridan WY   581H AIRUS, INC. - WY 654   2020-06-11   
307-218 1 Sheridan WY   9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654   2020-06-28   
307-218 2 Sheridan WY   450F ONVOY, LLC - WY 654   2019-12-27   
307-218 3 Sheridan WY   450F ONVOY, LLC - WY 654   2019-12-27   
307-218 4 Sheridan WY   450F ONVOY, LLC - WY 654   2021-03-01   
307-218 5 Sheridan WY   450F ONVOY, LLC - WY 654   2021-03-01   
307-218 6 Sheridan WY   450F ONVOY, LLC - WY 654   2020-12-19   
307-218 7 Sheridan WY   450F ONVOY, LLC - WY 654   2019-10-12   
307-218 8 Sheridan WY   450F ONVOY, LLC - WY 654   2020-12-19   
307-218 9 Sheridan WY   081F BANDWIDTH.COM CLEC, LLC - WY 654   2020-08-10   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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