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: 642

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
636-642 A Imperial MO STLSMOPLDS4  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 520      
636-642 0 Imperial MO STLSMOPLDS4  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 520   2005-02-10   
636-642 1 Imperial MO STLSMOPLDS4  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 520   2005-02-04   
636-642 2 Imperial MO STLSMO05XPX  506J TWILIO INTERNATIONAL, INC. 520   2021-06-04   
636-642 4 Imperial MO STLSMOPLDS4  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 520      
636-642 5 Imperial MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2023-08-12   
636-642 6 Imperial MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2023-08-12   
636-642 7 Imperial MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2023-08-12   
636-642 8 Imperial MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2023-08-12   
636-642 9 Imperial MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2023-08-12   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.