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: 573 [Rate centres in NPA 573] [Dial plan for NPA 573]

NXX: 425

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
573-425 A Hunnewell MO STLSMOWQDS2  093F ONVOY, LLC - MO 520      
573-425 0 Hunnewell MO STLSMOWQ8MD  073H TELNYX LLC 520   2020-07-31   
573-425 2 Hunnewell MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2021-03-06   
573-425 3 Hunnewell MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2021-03-06   
573-425 4 Hunnewell MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2018-12-08   
573-425 5 Hunnewell MO STLSMO05RMD  993E BANDWIDTH.COM CLEC, LLC - MO 520   2021-10-02   
573-425 6 Hunnewell MO STLSMO09XMD  7218 TELEPORT COMMUNICATIONS AMERICA, LLC - MO 520   2023-04-28   
573-425 7 Hunnewell MO STLSMOPLDS4  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 520   2013-10-14   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.