Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 503 [Rate centres in NPA 503] [Dial plan for NPA 503]

NXX: 831

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
503-831 A Dallas OR DLLSOR58DS1  9638 QWEST CORPORATION 672      
503-831 0 Dallas OR DLLSOR58DS1  9638 QWEST CORPORATION 672      
503-831 1 Dallas OR DLLSOR58DS1  9638 QWEST CORPORATION 672      
503-831 2 Dallas OR DLLSOR58DS1  9638 QWEST CORPORATION 672      
503-831 3 Dallas OR DLLSOR58DS1  9638 QWEST CORPORATION 672      
503-831 4 Dallas OR DLLSOR58DS1  9638 QWEST CORPORATION 672      
503-831 5 Dallas OR DLLSOR58DS1  9638 QWEST CORPORATION 672      
503-831 6 Dallas OR DLLSOR58DS1  9638 QWEST CORPORATION 672      
503-831 7 Dallas OR PTLDORWAXDX  508J CENTURYLINK COMMUNICATIONS, LLC 672   2014-01-06   
503-831 8 Dallas OR PTLDOR69UMD  076F BANDWIDTH.COM CLEC, LLC - OR 672   2011-10-10   
503-831 9 Dallas OR PTLDORWADS2  750E ONVOY, LLC - OR 672   2012-09-26   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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