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: 628

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
660-628 A Warrensburg MO WRBGMOXAXCX  093F ONVOY, LLC - MO 524      
660-628 0 Warrensburg MO   093F ONVOY, LLC - MO 524   2017-05-07   
660-628 1 Warrensburg MO   093F ONVOY, LLC - MO 524   2017-05-07   
660-628 2 Warrensburg MO   093F ONVOY, LLC - MO 524   2017-05-07   
660-628 3 Warrensburg MO   093F ONVOY, LLC - MO 524   2017-05-07   
660-628 4 Warrensburg MO   093F ONVOY, LLC - MO 524   2017-05-07   
660-628 5 Warrensburg MO   093F ONVOY, LLC - MO 524   2017-05-07   
660-628 6 Warrensburg MO   093F ONVOY, LLC - MO 524   2017-05-07   
660-628 7 Warrensburg MO   093F ONVOY, LLC - MO 524   2017-05-07   
660-628 8 Warrensburg MO   093F ONVOY, LLC - MO 524   2017-05-06   
660-628 9 Warrensburg MO   093F ONVOY, LLC - MO 524   2017-05-07   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.