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.
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OCN: 454H MIDWEST DATA CENTER, INC. - MO

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
660-442 1 Mound City MO RCPTMO020MD  524   2015-04-16   
660-623 6 Tarkio MO RCPTMO020MD  524   2015-04-16   
660-683 1 Craig MO RCPTMO020MD  524   2018-05-25   
660-686 1 Fairfax MO RCPTMO020MD  524   2015-04-16   
660-771 A Maryville MO RCPTMO020MD  524      
660-771 0 Maryville MO RCPTMO020MD  524   2015-03-19   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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