Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 740 [Rate centres in NPA 740] [Dial plan for NPA 740]

NXX: 830

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
740-830 A Mount Vernon OH MTVROHDD0MD  601G HORIZON SERVICES, INC. - OH 923      
740-830 1 Mount Vernon OH MTVROHDD0MD  601G HORIZON SERVICES, INC. - OH 923   2013-02-21   
740-830 2 Mount Vernon OH LIMAOHXAXPX  624H ONVOY SPECTRUM, LLC 923   2021-11-15   
740-830 3 Mount Vernon OH LIMAOHXAXPX  624H ONVOY SPECTRUM, LLC 923   2021-11-15   
740-830 4 Mount Vernon OH LIMAOHXAXPX  624H ONVOY SPECTRUM, LLC 923   2022-11-10   
740-830 5 Mount Vernon OH LIMAOHXAXPX  624H ONVOY SPECTRUM, LLC 923   2022-11-10   
740-830 6 Mount Vernon OH MNFDOHXAXSX  547D TIME WARNER CABLE INFORMATION SVCS (OHIO) - OH 923   2015-09-28   
740-830 7 Mount Vernon OH LIMAOHXAXPX  624H ONVOY SPECTRUM, LLC 923   2022-11-10   
740-830 8 Mount Vernon OH MNFDOHXAXDX  464C ONVOY, LLC - OH 923   2023-08-13   
740-830 9 Mount Vernon OH MNFDOHXAXDX  464C ONVOY, LLC - OH 923   2023-08-13   

Last updated: Wed, 07 Feb 2024 04:12:25 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.