Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 346 [Rate centres in NPA 346] [Dial plan for NPA 346]

NXX: 660

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
346-660 A Baytown TX BYTWTXXARMD  624H ONVOY SPECTRUM, LLC 560      
346-660 0 Baytown TX   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2021-08-04   
346-660 1 Baytown TX   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2022-11-04   
346-660 2 Baytown TX   903C ONVOY, LLC - TX 560   2021-07-17   
346-660 3 Baytown TX   903C ONVOY, LLC - TX 560   2021-07-17   
346-660 4 Baytown TX   903C ONVOY, LLC - TX 560   2021-07-17   
346-660 5 Baytown TX   903C ONVOY, LLC - TX 560   2021-07-17   
346-660 6 Baytown TX   624H ONVOY SPECTRUM, LLC 560   2021-04-07   
346-660 7 Baytown TX   624H ONVOY SPECTRUM, LLC 560   2021-04-07   
346-660 8 Baytown TX   624H ONVOY SPECTRUM, LLC 560   2021-04-07   
346-660 9 Baytown TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2022-11-27   

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

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