Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 240 [Rate centres in NPA 240] [Dial plan for NPA 240]

NXX: 680

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-680 A Frederick MD HGTWMD53DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 240      
240-680 0 Frederick MD   197D VONAGE AMERICA LLC 240   2018-12-21   
240-680 1 Frederick MD   197D VONAGE AMERICA LLC 240   2018-12-21   
240-680 2 Frederick MD   197D VONAGE AMERICA LLC 240   2018-12-21   
240-680 3 Frederick MD   197D VONAGE AMERICA LLC 240   2018-12-21   
240-680 4 Frederick MD   197D VONAGE AMERICA LLC 240   2018-12-21   
240-680 5 Frederick MD   197D VONAGE AMERICA LLC 240   2018-12-21   
240-680 6 Frederick MD   197D VONAGE AMERICA LLC 240   2018-12-21   
240-680 7 Frederick MD   197D VONAGE AMERICA LLC 240   2018-12-21   
240-680 8 Frederick MD   197D VONAGE AMERICA LLC 240   2018-12-21   
240-680 9 Frederick MD   568G PEERLESS NETWORK OF MARYLAND, LLC 240   2018-12-20   

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

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