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: 726

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
573-726 A Bernie MO STLSMOPLDS4  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 520      
573-726 4 Bernie MO   4932 LEVEL 3 COMMUNICATIONS, LLC - MO 520   2019-03-04   
573-726 6 Bernie MO   6123 TELEPORT COMMUNICATIONS AMERICA, LLC - MO 520   2022-08-02   
573-726 7 Bernie MO   6529 T-MOBILE USA, INC. 520   2025-04-13   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.