Local Calling Guide

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NPA: 918 [Rate centres in NPA 918] [Dial plan for NPA 918]

NXX: 668

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
918-668 A Castle OK BOLYOKXADS0  1977 CENTRAL OKLAHOMA TELEPHONE CO., L.L.C. 538      

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

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