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: 606

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
503-606 A Dallas OR INDPOR58DS0  9638 QWEST CORPORATION 672      
503-606 0 Dallas OR INDPOR58DS0  9638 QWEST CORPORATION 672      
503-606 1 Dallas OR INDPOR58DS0  9638 QWEST CORPORATION 672      
503-606 2 Dallas OR INDPOR58DS0  9638 QWEST CORPORATION 672      
503-606 3 Dallas OR INDPOR58DS0  9638 QWEST CORPORATION 672      
503-606 4 Dallas OR INDPOR58DS0  9638 QWEST CORPORATION 672      
503-606 5 Dallas OR INDPOR58DS0  9638 QWEST CORPORATION 672      
503-606 6 Dallas OR PTLDOR69UMD  076F BANDWIDTH.COM CLEC, LLC - OR 672   2014-10-18   
503-606 7 Dallas OR PTLEORTEPS0  7172 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 672   2007-08-18   
503-606 8 Dallas OR PTLDOR69UMD  076F BANDWIDTH.COM CLEC, LLC - OR 672   2011-07-03   
503-606 9 Dallas OR INDPOR58DS0  9638 QWEST CORPORATION 672      

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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