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: 575

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
580-575 A Eldorado OK   624H ONVOY SPECTRUM, LLC 536   2025-03-06   
580-575 0 Eldorado OK   624H ONVOY SPECTRUM, LLC 536   2025-03-06   
580-575 5 Eldorado OK   145J TERRA NOVA TELECOM INC. 536   2025-07-10   

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

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