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: 328

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
503-328 A Gresham OR PTLEORTEPS0  7172 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 672      
503-328 0 Gresham OR PTLEORTEPS0  7172 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 672      
503-328 1 Gresham OR PTLEORTEPS0  7172 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 672      
503-328 2 Gresham OR PTLEORTEPS0  7172 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 672      
503-328 3 Gresham OR PTLDORWAXDY  2998 MCLEODUSA TELECOMMUNICATION SERVICES, INC. - OR 672   2014-08-08   
503-328 4 Gresham OR PTLJORIY1MD  5562 METROPCS, INC. 672   2014-08-29   
503-328 5 Gresham OR PTLJORIY1MD  5562 METROPCS, INC. 672   2016-07-28   
503-328 6 Gresham OR PTLDOR13XFX  318J COMCAST IP PHONE, LLC 672   2011-10-01   
503-328 7 Gresham OR PTLDOR69X9X  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 672   2004-10-01   
503-328 8 Gresham OR PTLDOR13XFX  318J COMCAST IP PHONE, LLC 672   2006-01-26   
503-328 9 Gresham OR PTLDOR13XFX  318J COMCAST IP PHONE, LLC 672   2006-01-26   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.