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: 556

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
540-556 A Roanoke VA RONKVA95XSX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 244      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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