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: 308 [Rate centres in NPA 308] [Dial plan for NPA 308]

NXX: 290

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
308-290 A Dannebrog NE GDISNEAS69Z  490J BOOST SUBSCRIBERCO L.L.C. 646      
308-290 0 Dannebrog NE GDISNEAS69Z  490J BOOST SUBSCRIBERCO L.L.C. 646   2023-09-11   

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.