Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Portland, OH

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
740-843 A PTLDOHXARL0  0615 FRONTIER NORTH, INC. - OH 324      
740-843 0 ATHNOHXADMD  225H CEBRIDGE TELECOM OH, LLC DBA SUDDENLINK COMM 324   2022-09-18   
740-843 1 PTLDOHXARL0  0615 FRONTIER NORTH, INC. - OH 324      
740-843 2 CLMDOH44MMD  516J TON80 COMMUNICATIONS, LLC 324   2021-09-07   
740-843 3 ATHNOHXAMMD  624H ONVOY SPECTRUM, LLC 324   2023-05-08   
740-843 4 CLMBOHLT1MD  464C ONVOY, LLC - OH 324   2021-03-11   
740-843 5 PTLDOHXARL0  0615 FRONTIER NORTH, INC. - OH 324      
740-843 6   793K TWC IP ENABLED SERVICES, LLC 324   2026-08-02   
740-843 7 CLMBOH1125Z  508J CENTURYLINK COMMUNICATIONS, LLC 324   2014-07-08   
740-843 8 CLMBOHLT1MD  464C ONVOY, LLC - OH 324   2019-06-07   
740-843 9   145J TERRA NOVA TELECOM INC. 324   2025-07-24   

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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