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: 506

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
580-506 A Cache OK   624H ONVOY SPECTRUM, LLC 536   2025-03-06   
580-506 0 Cache OK   624H ONVOY SPECTRUM, LLC 536   2025-03-06   

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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