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: 757

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
503-757 A Portland OR PTLJORIY0MD  6529 T-MOBILE USA, INC. 672      
503-757 0 Portland OR PTLJORIY1MD  5562 METROPCS, INC. 672      
503-757 1 Portland OR PTLJORIY1MD  5562 METROPCS, INC. 672      
503-757 2 Portland OR PTLJORIY1MD  5562 METROPCS, INC. 672      
503-757 3 Portland OR PTLJORIY1MD  5562 METROPCS, INC. 672      
503-757 4 Portland OR PTLJORIY1MD  5562 METROPCS, INC. 672      
503-757 5 Portland OR PTLJORIY1MD  5562 METROPCS, INC. 672      
503-757 6 Portland OR PTLJORIY1MD  5562 METROPCS, INC. 672      
503-757 7 Portland OR PTLJORIY1MD  5562 METROPCS, INC. 672      
503-757 8 Portland OR PTLJORIY1MD  5562 METROPCS, INC. 672      
503-757 9 Portland OR PTLJORIY0MD  6529 T-MOBILE USA, INC. 672      

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.