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: 400

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
573-400 A West Quincy MO STLSMOWQDS2  093F ONVOY, LLC - MO 520      
573-400 0 West Quincy MO STLSMOWQDS2  093F ONVOY, LLC - MO 520      
573-400 2 West Quincy MO STLSMOWQDS2  093F ONVOY, LLC - MO 520      
573-400 3 West Quincy MO STLSMOWQDS2  093F ONVOY, LLC - MO 520      
573-400 4 West Quincy MO STLSMOWQDS2  093F ONVOY, LLC - MO 520      
573-400 5 West Quincy MO STLSMOWQDS2  093F ONVOY, LLC - MO 520      
573-400 6 West Quincy MO STLSMOWQDS2  093F ONVOY, LLC - MO 520      
573-400 7 West Quincy MO STLSMOPLDS4  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 520      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.