Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 740 [Rate centres in NPA 740] [Dial plan for NPA 740]

NXX: 778

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
740-778 A Portsmouth OH SWBSOHXARS0  0615 FRONTIER NORTH, INC. - OH 324      
740-778 0 Portsmouth OH PTMOOHXAXMD  624H ONVOY SPECTRUM, LLC 324   2022-11-11   
740-778 1 Portsmouth OH SWBSOHXARS0  0615 FRONTIER NORTH, INC. - OH 324      
740-778 2 Portsmouth OH SWBSOHXARS0  0615 FRONTIER NORTH, INC. - OH 324      
740-778 3 Portsmouth OH SWBSOHXARS0  0615 FRONTIER NORTH, INC. - OH 324      
740-778 4 Portsmouth OH   145J TERRA NOVA TELECOM INC. 324   2025-07-31   
740-778 5 Portsmouth OH CLMFOHJU7MD  6701 AERIAL COMMUNICATIONS, INC. 324   2021-10-07   
740-778 7 Portsmouth OH PTMOOHXAXMD  624H ONVOY SPECTRUM, LLC 324   2021-11-20   
740-778 8 Portsmouth OH PTMOOHXAXMD  624H ONVOY SPECTRUM, LLC 324   2021-11-20   
740-778 9 Portsmouth OH PTMOOHXAXMD  624H ONVOY SPECTRUM, LLC 324   2022-11-11   

Last updated: Sat, 02 May 2026 12:20:53 UTC

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