Local Calling Guide

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NPA: 503 [Rate centres in NPA 503] [Dial plan for NPA 503]

NXX: 206

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
503-206 A Portland OR PTLDORWADS2  750E ONVOY, LLC - OR 672      
503-206 0 Portland OR   750E ONVOY, LLC - OR 672   2006-05-14   
503-206 1 Portland OR   6529 T-MOBILE USA, INC. 672   2006-06-24   
503-206 2 Portland OR   6529 T-MOBILE USA, INC. 672   2006-07-24   
503-206 3 Portland OR   7172 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 672   2006-07-08   
503-206 4 Portland OR   318J COMCAST IP PHONE, LLC 672   2006-08-17   
503-206 5 Portland OR   318J COMCAST IP PHONE, LLC 672   2006-08-17   
503-206 6 Portland OR   318J COMCAST IP PHONE, LLC 672   2006-08-17   
503-206 7 Portland OR   318J COMCAST IP PHONE, LLC 672   2006-09-17   
503-206 8 Portland OR   318J COMCAST IP PHONE, LLC 672   2006-08-17   
503-206 9 Portland OR   6529 T-MOBILE USA, INC. 672   2006-09-22   

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

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