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: 428

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
503-428 A Salem OR BENDOR248MD  6010 NEW CINGULAR WIRELESS PCS, LLC 672      
503-428 0 Salem OR BENDOR248MD  6010 NEW CINGULAR WIRELESS PCS, LLC 672   2006-01-03   
503-428 1 Salem OR PTLDORWNAMD  5820 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 672   2004-09-04   
503-428 2 Salem OR PTLDORWNAMD  5820 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 672   2004-11-08   
503-428 3 Salem OR BENDOR248MD  6010 NEW CINGULAR WIRELESS PCS, LLC 672   2006-01-03   
503-428 4 Salem OR PTLDORWNAMD  5820 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 672   2005-02-06   
503-428 5 Salem OR PTLDOR13XRX  829J PAETEC ITEL, LLC 672   2003-12-13   
503-428 6 Salem OR BENDOR248MD  6010 NEW CINGULAR WIRELESS PCS, LLC 672   2005-02-25   
503-428 7 Salem OR BENDOR248MD  6010 NEW CINGULAR WIRELESS PCS, LLC 672   2005-03-28   
503-428 8 Salem OR PTLDORWNAMD  5820 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 672   2005-02-06   
503-428 9 Salem OR BENDOR248MD  6010 NEW CINGULAR WIRELESS PCS, LLC 672      

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.