Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 918 [Rate centres in NPA 918] [Dial plan for NPA 918]

NXX: 243

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
918-243 A Keystone OK MNFROKXADS0  1982 CIMARRON TEL. CO. 538      

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

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