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: 627

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
636-627 A St Charles MO   5607 CHARTER FIBERLINK - MISSOURI, LLC - MO 520      
636-627 0 St Charles MO   7218 TELEPORT COMMUNICATIONS AMERICA, LLC - MO 520      
636-627 1 St Charles MO STLVMOOH6MD  6529 T-MOBILE USA, INC. 520   2006-08-02   
636-627 2 St Charles MO   792K CHARTER IP ENABLED SERVICES, LLC 520   2010-12-27   
636-627 3 St Charles MO   792K CHARTER IP ENABLED SERVICES, LLC 520   2010-12-27   
636-627 4 St Charles MO   792K CHARTER IP ENABLED SERVICES, LLC 520   2010-12-27   
636-627 5 St Charles MO   792K CHARTER IP ENABLED SERVICES, LLC 520   2010-12-27   
636-627 6 St Charles MO   792K CHARTER IP ENABLED SERVICES, LLC 520   2010-12-27   
636-627 7 St Charles MO NWTPMOABGT1  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2006-07-22   
636-627 8 St Charles MO NWTPMOABGT1  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2006-07-22   
636-627 9 St Charles MO STLVMOOH6MD  6529 T-MOBILE USA, INC. 520   2005-12-08   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.