Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 660 [Rate centres in NPA 660] [Dial plan for NPA 660]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
660-999 6 Chillicothe MO KSCYMO55XJZ  490J BOOST SUBSCRIBERCO L.L.C. 524   2024-08-25   
660-999 9 Chillicothe MO KSCYMO55XNY  073H TELNYX LLC 524   2017-04-22   

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

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