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: 800

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
503-800 A Gervais OR PTLDORWAXKY  936F ASTOUND BROADBAND, LLC - OR 672      
503-800 0 Gervais OR PTLDORWAXKY  936F ASTOUND BROADBAND, LLC - OR 672   2009-08-03   
503-800 1 Gervais OR BENDOR248MD  6010 NEW CINGULAR WIRELESS PCS, LLC 672   2014-10-29   
503-800 2 Gervais OR PTLDOR13XFX  318J COMCAST IP PHONE, LLC 672   2022-03-11   
503-800 3 Gervais OR PTLDOR62GT2  6010 NEW CINGULAR WIRELESS PCS, LLC 672   2025-01-12   
503-800 6 Gervais OR   145J TERRA NOVA TELECOM INC. 672   2025-07-12   
503-800 7 Gervais OR BENDOR248MD  6010 NEW CINGULAR WIRELESS PCS, LLC 672   2020-08-13   
503-800 8 Gervais OR BENDOR248MD  6010 NEW CINGULAR WIRELESS PCS, LLC 672   2019-09-25   
503-800 9 Gervais OR BENDOR248MD  6010 NEW CINGULAR WIRELESS PCS, LLC 672   2017-12-04   

Last updated: Tue, 07 Oct 2025 16:47:53 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.