Local Calling Guide

Area code/prefix search

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NPA: 817 [Rate centres in NPA 817] [Dial plan for NPA 817]

NXX: 623

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
817-623 A Keller TX   903C ONVOY, LLC - TX 552      
817-623 0 Keller TX   903C ONVOY, LLC - TX 552      
817-623 1 Keller TX   903C ONVOY, LLC - TX 552      
817-623 2 Keller TX   903C ONVOY, LLC - TX 552      
817-623 3 Keller TX   903C ONVOY, LLC - TX 552      
817-623 4 Keller TX DLLSTXALDS4  903C ONVOY, LLC - TX 552   2022-09-26   
817-623 5 Keller TX DLLSTXALDS4  903C ONVOY, LLC - TX 552   2022-09-26   
817-623 6 Keller TX   903C ONVOY, LLC - TX 552      
817-623 7 Keller TX DLLSTXRIXHZ  478J NUSO, LLC 552   2023-11-26   
817-623 8 Keller TX   903C ONVOY, LLC - TX 552      
817-623 9 Keller TX DLLSTX97X1X  073H TELNYX LLC 552   2017-06-12   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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