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: 501 [Rate centres in NPA 501] [Dial plan for NPA 501]

NXX: 338

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
501-338 A Bismarck AR LTRKARWTBMD  5179 LEVEL 3 COMMUNICATIONS, LLC - AR 528      
501-338 1 Bismarck AR NLRKAR446MD  5562 METROPCS, INC. 528   2021-05-15   
501-338 2 Bismarck AR LTRKARWTBMD  5179 LEVEL 3 COMMUNICATIONS, LLC - AR 528   2019-06-03   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.