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: 574

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
740-574 A Portsmouth OH WHBGOHXARS0  0615 FRONTIER NORTH, INC. - OH 324      
740-574 0 Portsmouth OH   0615 FRONTIER NORTH, INC. - OH 324      
740-574 1 Portsmouth OH   0615 FRONTIER NORTH, INC. - OH 324      
740-574 2 Portsmouth OH   0615 FRONTIER NORTH, INC. - OH 324      
740-574 3 Portsmouth OH   464C ONVOY, LLC - OH 324   2022-12-15   
740-574 4 Portsmouth OH   0615 FRONTIER NORTH, INC. - OH 324      
740-574 5 Portsmouth OH   0615 FRONTIER NORTH, INC. - OH 324      
740-574 6 Portsmouth OH   0615 FRONTIER NORTH, INC. - OH 324      
740-574 7 Portsmouth OH   5562 METROPCS, INC. 324   2022-11-17   
740-574 8 Portsmouth OH   0615 FRONTIER NORTH, INC. - OH 324      
740-574 9 Portsmouth OH   0615 FRONTIER NORTH, INC. - OH 324      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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