Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 903 [Rate centres in NPA 903] [Dial plan for NPA 903]

NXX: 929

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
903-929 A Windom TX DLLATX37DS6  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552      
903-929 1 Windom TX   903C ONVOY, LLC - TX 552   2012-12-13   
903-929 2 Windom TX   516J TON80 COMMUNICATIONS, LLC 552   2021-09-24   
903-929 3 Windom TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2012-04-09   
903-929 4 Windom TX   177F PEERLESS NETWORK OF TEXAS, LLC - TX 552   2013-04-24   
903-929 5 Windom TX   177F PEERLESS NETWORK OF TEXAS, LLC - TX 552   2013-04-24   
903-929 6 Windom TX   508J CENTURYLINK COMMUNICATIONS, LLC 552   2014-05-16   
903-929 7 Windom TX   903C ONVOY, LLC - TX 552   2012-12-13   
903-929 8 Windom TX   515J IP HORIZON LLC 552   2017-12-15   

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

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