Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 580 [Rate centres in NPA 580] [Dial plan for NPA 580]

NXX: 631

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
580-631 A Beaver OK   5257 LEVEL 3 COMMUNICATIONS, LLC - OK 546   2026-07-10   
580-631 2 Beaver OK   5257 LEVEL 3 COMMUNICATIONS, LLC - OK 546   2026-07-10   

Last updated: Tue, 16 Jun 2026 00:09:45 UTC

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