Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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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   073H TELNYX LLC 644   2023-05-12   
531-286 1 Oakland NE   624H ONVOY SPECTRUM, LLC 644   2024-12-20   
531-286 2 Oakland NE   549E ONVOY, LLC - NE 644   2022-11-28   
531-286 4 Oakland NE   3233 LEVEL 3 COMMUNICATIONS, LLC - NE 644   2022-10-11   
531-286 8 Oakland NE   549E ONVOY, LLC - NE 644   2023-09-16   
531-286 9 Oakland NE   5807 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE 644   2026-01-19   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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