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: 531 [Rate centres in NPA 531] [Dial plan for NPA 531]

NXX: 307

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
531-307 A Homer NE SXCYIA78X1X  3233 LEVEL 3 COMMUNICATIONS, LLC - NE 630      
531-307 1 Homer NE SXCYIA78X1X  3233 LEVEL 3 COMMUNICATIONS, LLC - NE 630   2023-03-07   
531-307 8 Homer NE SXCYIADT9MD  549E ONVOY, LLC - NE 630   2023-09-01   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.