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: 636 [Rate centres in NPA 636] [Dial plan for NPA 636]

NXX: 777

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
636-777 A Chesterfield MO STLSMOWQDS2  093F ONVOY, LLC - MO 520      
636-777 0 Chesterfield MO STLVMOOH2MD  6529 T-MOBILE USA, INC. 520      
636-777 1 Chesterfield MO STLVMOOH2MD  6529 T-MOBILE USA, INC. 520      
636-777 2 Chesterfield MO STLSMO05XMX  624H ONVOY SPECTRUM, LLC 520      
636-777 3 Chesterfield MO STLSMO05XMX  624H ONVOY SPECTRUM, LLC 520      
636-777 4 Chesterfield MO STLSMOWQDS2  093F ONVOY, LLC - MO 520      
636-777 5 Chesterfield MO STLTMOBODS1  7432 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 520      
636-777 6 Chesterfield MO STLVMOOH2MD  6529 T-MOBILE USA, INC. 520      
636-777 7 Chesterfield MO STLSMOWQDS2  093F ONVOY, LLC - MO 520      
636-777 8 Chesterfield MO OLVEMOAXCA0  5607 CHARTER FIBERLINK - MISSOURI, LLC - MO 520      
636-777 9 Chesterfield MO STLVMOOH2MD  6529 T-MOBILE USA, INC. 520      

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.