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.

Patterson, MO

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
573-856 A PASNMOXXRS0  1885 WINDSTREAM MISSOURI, INC. 520      
573-856 0 PASNMOXXRP0  1885 WINDSTREAM MISSOURI, INC. 520      
573-856 3 STLSMO05RMD  993E BANDWIDTH.COM CLEC, LLC - MO 520   2017-10-16   
573-856 4 PASNMOXXRS0  1885 WINDSTREAM MISSOURI, INC. 520      
573-856 5 STLSMOWQDS2  093F ONVOY, LLC - MO 520   2021-07-24   
573-856 9 PASNMOXXRP1  1885 WINDSTREAM MISSOURI, INC. 520   2020-02-17   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.