Local Calling Guide

Area code/prefix search

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

NXX: 437

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
903-437 A Brownsboro TX ATHNTXXATMD  903C ONVOY, LLC - TX 552      
903-437 0 Brownsboro TX   793K TWC IP ENABLED SERVICES, LLC 552   2023-08-20   
903-437 1 Brownsboro TX   318C CEBRIDGE TELECOM TX , L.P. - TX 552   2022-07-18   
903-437 2 Brownsboro TX   903C ONVOY, LLC - TX 552   2021-02-03   
903-437 3 Brownsboro TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2014-05-16   
903-437 4 Brownsboro TX   004F BANDWIDTH.COM CLEC, LLC - TX 552   2017-10-19   
903-437 5 Brownsboro TX   903C ONVOY, LLC - TX 552   2018-09-16   
903-437 6 Brownsboro TX   903C ONVOY, LLC - TX 552   2021-02-03   
903-437 7 Brownsboro TX   903C ONVOY, LLC - TX 552   2020-08-21   
903-437 8 Brownsboro TX   903C ONVOY, LLC - TX 552   2020-08-21   
903-437 9 Brownsboro TX   903C ONVOY, LLC - TX 552   2020-08-21   

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

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