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: 990

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
540-990 A Dahlgren VA CLPPVACUNMD  506J TWILIO INTERNATIONAL, INC. 246      
540-990 1 Dahlgren VA   138E ONVOY, LLC - VA 246   2020-07-10   
540-990 2 Dahlgren VA   138E ONVOY, LLC - VA 246   2020-07-10   
540-990 3 Dahlgren VA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 246   2021-04-02   
540-990 4 Dahlgren VA   506J TWILIO INTERNATIONAL, INC. 246   2022-04-10   
540-990 5 Dahlgren VA   5562 METROPCS, INC. 246   2021-09-23   
540-990 7 Dahlgren VA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 246   2023-09-23   
540-990 8 Dahlgren VA   624H ONVOY SPECTRUM, LLC 246   2021-12-02   
540-990 9 Dahlgren VA   624H ONVOY SPECTRUM, LLC 246   2021-12-02   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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