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: 338

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
573-338 A Jefferson City MO JFCYMOXAYMD  6275 UNITED STATES CELLULAR - MO 521      
573-338 0 Jefferson City MO   6275 UNITED STATES CELLULAR - MO 521      
573-338 1 Jefferson City MO   6275 UNITED STATES CELLULAR - MO 521      
573-338 2 Jefferson City MO   6275 UNITED STATES CELLULAR - MO 521      
573-338 3 Jefferson City MO   6275 UNITED STATES CELLULAR - MO 521      
573-338 4 Jefferson City MO   6275 UNITED STATES CELLULAR - MO 521      
573-338 5 Jefferson City MO   6275 UNITED STATES CELLULAR - MO 521      
573-338 6 Jefferson City MO   6275 UNITED STATES CELLULAR - MO 521      
573-338 7 Jefferson City MO   6275 UNITED STATES CELLULAR - MO 521      
573-338 8 Jefferson City MO   6275 UNITED STATES CELLULAR - MO 521      
573-338 9 Jefferson City MO   6275 UNITED STATES CELLULAR - MO 521      

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.