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: 506

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
573-506 A Tebbetts MO CLMAMOWB0MD  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 521      
573-506 0 Tebbetts MO   490J DISH WIRELESS, LLC 521   2023-08-07   
573-506 2 Tebbetts MO   4932 LEVEL 3 COMMUNICATIONS, LLC - MO 521   2017-12-24   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.