Local Calling Guide

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NPA: 903 [Rate centres in NPA 903] [Dial plan for NPA 903]

NXX: 867

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
903-867 A Mount Vernon TX   793K TWC IP ENABLED SERVICES, LLC 554      
903-867 0 Mount Vernon TX LGVWTXBA47Z  6529 T-MOBILE USA, INC. 554   2022-07-25   
903-867 1 Mount Vernon TX   793K TWC IP ENABLED SERVICES, LLC 554   2022-07-24   
903-867 2 Mount Vernon TX TXRKTXXAHMD  624H ONVOY SPECTRUM, LLC 554   2024-01-15   
903-867 3 Mount Vernon TX   6529 T-MOBILE USA, INC. 554   2022-08-17   
903-867 4 Mount Vernon TX TXRKTXXAHMD  624H ONVOY SPECTRUM, LLC 554   2024-01-15   
903-867 5 Mount Vernon TX   903C ONVOY, LLC - TX 554   2025-11-19   
903-867 6 Mount Vernon TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 554   2026-03-15   
903-867 7 Mount Vernon TX LGVWTXPLXEX  903C ONVOY, LLC - TX 554   2022-07-25   
903-867 8 Mount Vernon TX LGVWTXPLXEX  903C ONVOY, LLC - TX 554   2023-08-06   
903-867 9 Mount Vernon TX LGVWTXBA47Z  6529 T-MOBILE USA, INC. 554   2022-07-25   

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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