Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Byron, OK

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
580-474 A BYRNOKXA1MD  1831 SOUTH CENTRAL TEL ASSN INC 536      

Last updated: Sat, 02 May 2026 12:20:53 UTC

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