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: 639

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
307-639 A Lander WY CHYNWYRFKMD  114J EXIANT COMMUNICATIONS LLC 654   2026-05-22   
307-639 7 Lander WY CHYNWYRFKMD  114J EXIANT COMMUNICATIONS LLC 654   2026-05-22   

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

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