Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 330 [Rate centres in NPA 330] [Dial plan for NPA 330]

NXX: 820

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
330-820 A Youngstown OH YNTWOHHD5MD  6630 USA MOBILITY WIRELESS, INC. 322      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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