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: 631

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
740-631 A Summerfield OH SRFDOHXARS0  0615 FRONTIER NORTH, INC. - OH 324      
740-631 0 Summerfield OH SRFDOHXARS0  0615 FRONTIER NORTH, INC. - OH 324      
740-631 1 Summerfield OH CLMBOHLT7MD  073H TELNYX LLC 324   2021-01-22   
740-631 2 Summerfield OH CLMDOHZI6MD  4863 LEVEL 3 COMMUNICATIONS, LLC - OH 324   2007-02-10   
740-631 3 Summerfield OH JKTPOHBA0MD  601G HORIZON SERVICES, INC. - OH 324   2012-11-25   
740-631 4 Summerfield OH CMBROHXB4MD  464C ONVOY, LLC - OH 324   2021-03-11   
740-631 6 Summerfield OH CMBROHXB4MD  464C ONVOY, LLC - OH 324   2018-09-20   
740-631 8 Summerfield OH CMBROHXBIMD  624H ONVOY SPECTRUM, LLC 324   2024-10-27   

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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