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: 998

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
307-998 A Sheridan WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2024-08-05   
307-998 0 Sheridan WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2024-08-05   
307-998 1 Sheridan WY CSPRWYMAXEX  6529 T-MOBILE USA, INC. 654   2025-11-23   
307-998 2 Sheridan WY CSPRWYMAXEX  6529 T-MOBILE USA, INC. 654   2025-06-11   
307-998 3 Sheridan WY CSPRWYMAXEX  6529 T-MOBILE USA, INC. 654   2025-01-17   
307-998 4 Sheridan WY CSPRWYMAXEX  6529 T-MOBILE USA, INC. 654   2025-01-17   
307-998 5 Sheridan WY CSPRWYMAXEX  6529 T-MOBILE USA, INC. 654   2025-01-17   
307-998 6 Sheridan WY CSPRWYMAXEX  6529 T-MOBILE USA, INC. 654   2025-06-11   
307-998 7 Sheridan WY CSPRWYMAXEX  6529 T-MOBILE USA, INC. 654   2025-06-11   
307-998 8 Sheridan WY CSPRWYMAXEX  6529 T-MOBILE USA, INC. 654   2024-09-30   
307-998 9 Sheridan WY CSPRWYMAXEX  6529 T-MOBILE USA, INC. 654   2024-09-30   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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