Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 830 [Rate centres in NPA 830] [Dial plan for NPA 830]

NXX: 300

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
830-300 A Cost TX BLVRTXXA5MD  903C ONVOY, LLC - TX 566      
830-300 0 Cost TX BLVRTXXA5MD  903C ONVOY, LLC - TX 566   2023-12-09   
830-300 3 Cost TX   145J TERRA NOVA TELECOM INC. 566   2025-08-29   
830-300 6 Cost TX SNANTXCA41Z  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 566   2023-12-04   
830-300 8 Cost TX BLVRTXXA5MD  903C ONVOY, LLC - TX 566   2022-12-03   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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