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.

Mount Sterling, MO

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
573-943 A MTSTMOXADS0  9787 CENTURYTEL MISSOURI LLC (SOUTHWEST)DBA CENTURYLINK 521      
573-943 0 CLMAMOXAXIX  093F ONVOY, LLC - MO 521   2019-11-29   
573-943 1 JFCYMOXAXSX  073H TELNYX LLC 521   2020-08-02   
573-943 2 MTSTMOXADS0  9787 CENTURYTEL MISSOURI LLC (SOUTHWEST)DBA CENTURYLINK 521      
573-943 3 CLMAMOWB0MD  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 521   2013-08-26   
573-943 4 CLMAMOXAXIX  093F ONVOY, LLC - MO 521   2018-07-16   
573-943 5 CLMAMOXAXIX  093F ONVOY, LLC - MO 521   2021-03-06   
573-943 6 MTSTMOXADS0  9787 CENTURYTEL MISSOURI LLC (SOUTHWEST)DBA CENTURYLINK 521      
573-943 8   624H ONVOY SPECTRUM, LLC 521   2024-03-05   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.