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: 300

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
660-300 A Grant City MO KSCYMO55X0Z  965H FRACTEL, LLC 524      
660-300 0 Grant City MO   965H FRACTEL, LLC 524   2019-10-02   
660-300 1 Grant City MO   093F ONVOY, LLC - MO 524   2023-10-09   
660-300 2 Grant City MO   093F ONVOY, LLC - MO 524   2021-05-15   
660-300 3 Grant City MO   965H FRACTEL, LLC 524   2019-10-02   
660-300 4 Grant City MO   4932 LEVEL 3 COMMUNICATIONS, LLC - MO 524   2021-07-13   
660-300 5 Grant City MO   093F ONVOY, LLC - MO 524   2021-06-19   
660-300 6 Grant City MO   093F ONVOY, LLC - MO 524   2020-10-25   
660-300 7 Grant City MO   624H ONVOY SPECTRUM, LLC 524   2025-01-18   
660-300 8 Grant City MO   5814 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 524   2024-10-17   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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