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: 433

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
636-433 A Marthasville MO MTVLMOXARS0  9787 BRIGHTSPEED OF MISSOURI, LLC 520      
636-433 0 Marthasville MO STLSMOWQ8MD  073H TELNYX LLC 520   2020-08-01   
636-433 2 Marthasville MO MTVLMOXARS0  9787 BRIGHTSPEED OF MISSOURI, LLC 520      
636-433 3 Marthasville MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2020-11-13   
636-433 4 Marthasville MO STLSMOPLDS4  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 520   2005-08-21   
636-433 5 Marthasville MO MTVLMOXARS0  9787 BRIGHTSPEED OF MISSOURI, LLC 520      
636-433 6 Marthasville MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2020-11-13   
636-433 8 Marthasville MO STLSMOPLDS4  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 520   2011-04-14   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.