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: 504

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
573-504 A Puxico MO STLSMO05RMD  993E BANDWIDTH.COM CLEC, LLC - MO 520      
573-504 0 Puxico MO STLSMO05RMD  993E BANDWIDTH.COM CLEC, LLC - MO 520   2017-03-17   
573-504 1 Puxico MO STLSMOGZ6MD  073H TELNYX LLC 520   2018-10-24   
573-504 2 Puxico MO CPGRMOLK0MD  5607 CHARTER FIBERLINK - MISSOURI, LLC - MO 520   2024-12-08   
573-504 5 Puxico MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2021-07-24   
573-504 6 Puxico MO STLSMO09XMD  6123 TELEPORT COMMUNICATIONS AMERICA, LLC - MO 520   2017-07-03   
573-504 8 Puxico MO STLSMO05XMX  624H ONVOY SPECTRUM, LLC 520   2025-01-11   
573-504 9 Puxico MO STLSMOGZDS5  225F PEERLESS NETWORK OF MISSOURI, LLC - MO 520   2024-02-23   

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.