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: 660 [Rate centres in NPA 660] [Dial plan for NPA 660]

NXX: 717

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
660-717 A Marshall MO KSCYMO55XXX  093F ONVOY, LLC - MO 524      
660-717 0 Marshall MO KSCYMO55XXX  093F ONVOY, LLC - MO 524   2016-03-04   
660-717 1 Marshall MO KSCYKSJOSMD  993E BANDWIDTH.COM CLEC, LLC - MO 524   2016-07-16   
660-717 2 Marshall MO KSCYMO55XXX  093F ONVOY, LLC - MO 524   2017-07-03   
660-717 3 Marshall MO KSCYMO55XXX  093F ONVOY, LLC - MO 524   2019-05-17   
660-717 4 Marshall MO KSCYMO55XXX  093F ONVOY, LLC - MO 524   2021-05-15   
660-717 5 Marshall MO KSCYMO55XXX  093F ONVOY, LLC - MO 524   2021-05-15   
660-717 6 Marshall MO   093F ONVOY, LLC - MO 524   2024-04-05   
660-717 8 Marshall MO KSCYMO55X6Z  506J TWILIO INTERNATIONAL, INC. 524   2021-06-11   
660-717 9 Marshall MO   624H ONVOY SPECTRUM, LLC 524   2024-03-20   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.