Local Calling Guide

Area code/prefix search

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

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
918-788 A WLCHOKXADS0  1966 ATLAS TEL. CO. 538      

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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