Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 225 [Rate centres in NPA 225] [Dial plan for NPA 225]

NXX: 550

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
225-550 A Denham Springs LA   749E ONVOY, LLC - LA 492   2026-10-31   
225-550 0 Denham Springs LA   749E ONVOY, LLC - LA 492   2026-10-31   

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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