Local Calling Guide

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

NXX: 744

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
503-744 A Clackamas OR PTLDOR62DS2  7531 TELEPORT COMMUNICATIONS AMERICA, LLC - OR 672      
503-744 0 Clackamas OR   318J COMCAST IP PHONE, LLC 672      
503-744 1 Clackamas OR   6010 NEW CINGULAR WIRELESS PCS, LLC 672   2017-08-07   
503-744 2 Clackamas OR   6529 T-MOBILE USA, INC. 672   2017-10-20   
503-744 3 Clackamas OR   7531 TELEPORT COMMUNICATIONS AMERICA, LLC - OR 672      
503-744 4 Clackamas OR   318J COMCAST IP PHONE, LLC 672   2016-05-23   
503-744 5 Clackamas OR   750E ONVOY, LLC - OR 672   2012-12-17   
503-744 6 Clackamas OR   750E ONVOY, LLC - OR 672   2014-01-02   
503-744 7 Clackamas OR   750E ONVOY, LLC - OR 672   2014-01-02   
503-744 8 Clackamas OR   9638 QWEST CORPORATION 672   2010-11-19   
503-744 9 Clackamas OR   5562 METROPCS, INC. 672   2017-07-03   

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

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