Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 540 [Rate centres in NPA 540] [Dial plan for NPA 540]

NXX: 320

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
540-320 A Radford VA RCMTVAXA5MD  6283 UNITED STATES CELLULAR - VA 244      

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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