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: 358

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
531-358 A Louisville NE LNCLNEXLX3Y  5807 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE 958   2024-03-23   
531-358 0 Louisville NE LNCLNEXLX3Y  5807 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE 958   2024-03-23   
531-358 1 Louisville NE LNCLNEXLX2Y  624H ONVOY SPECTRUM, LLC 958   2024-03-26   
531-358 2 Louisville NE   490J BOOST SUBSCRIBERCO L.L.C. 958   2025-10-01   
531-358 3 Louisville NE   5807 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE 958   2026-03-08   
531-358 4 Louisville NE   793K TWC IP ENABLED SERVICES, LLC 958   2026-04-09   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.