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.

Qulin, MO

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
573-328 A QULNMOFARS3  9533 SOUTHWESTERN BELL 520      
573-328 0   993E BANDWIDTH.COM CLEC, LLC - MO 520   2012-01-12   
573-328 1   9533 SOUTHWESTERN BELL 520      
573-328 2   993E BANDWIDTH.COM CLEC, LLC - MO 520   2016-07-22   
573-328 3   093F ONVOY, LLC - MO 520   2016-09-29   
573-328 4   9533 SOUTHWESTERN BELL 520      
573-328 5   516C AT&T CORP. 520   2011-05-20   
573-328 6   225F PEERLESS NETWORK OF MISSOURI, LLC - MO 520   2013-05-05   
573-328 7   508J CENTURYLINK COMMUNICATIONS, LLC 520   2014-07-24   
573-328 9   225F PEERLESS NETWORK OF MISSOURI, LLC - MO 520   2013-05-05   
573-404 A STLSMOWQDS2  093F ONVOY, LLC - MO 520      
573-404 0   515J IP HORIZON LLC 520   2013-12-19   
573-404 1   073H TELNYX LLC 520   2019-09-30   
573-404 2   515J IP HORIZON LLC 520   2023-12-29   
573-404 3   7432 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 520   2019-06-12   
573-404 4   515J IP HORIZON LLC 520   2023-12-29   
573-404 5   093F ONVOY, LLC - MO 520   2021-07-24   
573-404 8   624H ONVOY SPECTRUM, LLC 520   2025-01-11   

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.