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: 355

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
346-355 A Houston TX HSTNTXYALMD  597F VOIP INNOVATIONS, LLC 560      
346-355 0 Houston TX   597F VOIP INNOVATIONS, LLC 560   2018-09-28   
346-355 1 Houston TX   903C ONVOY, LLC - TX 560   2019-03-21   
346-355 2 Houston TX   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2020-05-07   
346-355 3 Houston TX   903C ONVOY, LLC - TX 560   2020-01-16   
346-355 4 Houston TX   903C ONVOY, LLC - TX 560   2020-01-16   
346-355 5 Houston TX   903C ONVOY, LLC - TX 560   2020-01-16   
346-355 6 Houston TX   903C ONVOY, LLC - TX 560   2020-01-16   
346-355 7 Houston TX   903C ONVOY, LLC - TX 560   2020-01-16   
346-355 8 Houston TX   903C ONVOY, LLC - TX 560   2019-03-21   
346-355 9 Houston TX   903C ONVOY, LLC - TX 560   2019-03-21   

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

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