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: 540

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
540-540 A Glasgow VA RONKVALKXGX  624H ONVOY SPECTRUM, LLC 244      
540-540 0 Glasgow VA RONKVALKXGX  624H ONVOY SPECTRUM, LLC 244   2023-10-07   
540-540 2 Glasgow VA   138E ONVOY, LLC - VA 244   2026-01-12   
540-540 4 Glasgow VA   138E ONVOY, LLC - VA 244   2026-01-12   
540-540 5 Glasgow VA   138E ONVOY, LLC - VA 244   2026-01-12   
540-540 7 Glasgow VA   138E ONVOY, LLC - VA 244   2026-01-12   
540-540 8 Glasgow VA   138E ONVOY, LLC - VA 244   2026-01-12   

Last updated: Sat, 21 Mar 2026 23:53:39 UTC

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