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: 318

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
531-318 A Wilber NE LNCLNEXLXFX  549E ONVOY, LLC - NE 958      
531-318 0 Wilber NE LNCLNEXLXFX  549E ONVOY, LLC - NE 958   2023-09-16   
531-318 1 Wilber NE LNCLNEXLXFX  549E ONVOY, LLC - NE 958   2023-06-15   
531-318 8 Wilber NE   5807 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE 958   2025-03-28   
531-318 9 Wilber NE LNCLNEXLX2Y  624H ONVOY SPECTRUM, LLC 958   2024-03-16   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.