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: 821

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
636-821 A Pond MCA4 MO STLSMOGZRMD  4891 WINDSTREAM NUVOX MISSOURI, LLC 520      
636-821 0 Pond MCA4 MO   145J TERRA NOVA TELECOM INC. 520   2022-01-04   
636-821 1 Pond MCA4 MO OLVEMOAXCA0  5607 CHARTER FIBERLINK - MISSOURI, LLC - MO 520   2004-02-01   
636-821 2 Pond MCA4 MO STLSMOGZRMD  4891 WINDSTREAM NUVOX MISSOURI, LLC 520      
636-821 3 Pond MCA4 MO OLVEMOAXCA0  5607 CHARTER FIBERLINK - MISSOURI, LLC - MO 520   2006-04-16   
636-821 4 Pond MCA4 MO STLSMOPLDS4  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 520   2005-10-09   
636-821 5 Pond MCA4 MO STLSMOGZRMD  4891 WINDSTREAM NUVOX MISSOURI, LLC 520   2009-08-20   
636-821 6 Pond MCA4 MO STLSMOGZDS5  225F PEERLESS NETWORK OF MISSOURI, LLC - MO 520   2010-02-12   
636-821 7 Pond MCA4 MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2023-08-12   
636-821 8 Pond MCA4 MO STLSMOPLDS4  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 520   2004-12-15   
636-821 9 Pond MCA4 MO STLSMO05XPX  506J TWILIO INTERNATIONAL, INC. 520   2021-06-04   

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.