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: 559

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
660-559 A Madison MO MDSNMOXAPS0  1885 WINDSTREAM MISSOURI, INC. 524      
660-559 0 Madison MO   792K CHARTER IP ENABLED SERVICES, LLC 524   2021-03-03   
660-559 5 Madison MO   145J TERRA NOVA TELECOM INC. 524   2025-09-01   
660-559 9 Madison MO MDSNMOXAPS0  1885 WINDSTREAM MISSOURI, INC. 524   2016-08-25   

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.