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]

NXX: 409

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
660-409 A Houstonia MO WRBGMOXAXCX  093F ONVOY, LLC - MO 524      
660-409 1 Houstonia MO WRBGMOXAXCX  093F ONVOY, LLC - MO 524   2023-02-13   

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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