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: 286

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
531-286 A Oakland NE BLLVNEBL5MD  3233 LEVEL 3 COMMUNICATIONS, LLC - NE 644      
531-286 0 Oakland NE OMAHNENWX6Y  073H TELNYX LLC 644   2023-05-12   
531-286 1 Oakland NE OMAHNENWX2Y  624H ONVOY SPECTRUM, LLC 644   2024-12-20   
531-286 2 Oakland NE OMAHNENWXPX  549E ONVOY, LLC - NE 644   2022-11-28   
531-286 4 Oakland NE BLLVNEBL5MD  3233 LEVEL 3 COMMUNICATIONS, LLC - NE 644   2022-10-11   
531-286 8 Oakland NE OMAHNENWXPX  549E ONVOY, LLC - NE 644   2023-09-16   

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.