Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

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

NXX: 344

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
503-344 A Clackamas OR PTLGORIAAMD  8656 GLOBAL CROSSING LOCAL SERVICES, INC. - OR 672      
503-344 0 Clackamas OR   624H ONVOY SPECTRUM, LLC 672      
503-344 1 Clackamas OR PTLGORIA7MD  3234 LEVEL 3 COMMUNICATIONS, LLC - OR 672      
503-344 2 Clackamas OR PTLGORIA7MD  3234 LEVEL 3 COMMUNICATIONS, LLC - OR 672      
503-344 4 Clackamas OR PTLDOR13XFX  318J COMCAST IP PHONE, LLC 672      
503-344 5 Clackamas OR PTLGORIAAMD  8656 GLOBAL CROSSING LOCAL SERVICES, INC. - OR 672      
503-344 6 Clackamas OR PTLDOR13XFX  318J COMCAST IP PHONE, LLC 672      
503-344 7 Clackamas OR PTLJORIY0MD  6529 T-MOBILE USA, INC. 672      
503-344 8 Clackamas OR PTLJORIY0MD  6529 T-MOBILE USA, INC. 672      
503-344 9 Clackamas OR   624H ONVOY SPECTRUM, LLC 672      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.