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.

Parma, MO

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
573-357 A STELMOXADS0  0463 BPS TELEPHONE COMPANY 520      
573-357 0 STLSMOPLDS4  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 520   2021-12-25   
573-357 1 STELMOXADS0  0463 BPS TELEPHONE COMPANY 520      
573-357 2 STELMOXADS0  0463 BPS TELEPHONE COMPANY 520      
573-357 4 STELMOXADS0  0463 BPS TELEPHONE COMPANY 520      
573-357 5 STELMOXADS0  0463 BPS TELEPHONE COMPANY 520      
573-357 6 STLSMO05XMX  624H ONVOY SPECTRUM, LLC 520   2020-08-05   
573-357 7 STLSMO05XMX  624H ONVOY SPECTRUM, LLC 520   2020-08-05   
573-357 8 STLSMO05XMX  624H ONVOY SPECTRUM, LLC 520   2020-08-05   
573-357 9 STELMOXADS0  0463 BPS TELEPHONE COMPANY 520      

Last updated: Sat, 04 Jul 2026 13:07:56 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.