NetSwitch I / IPChanger

  - Seoul MetroPolitan Government

  - Seoul Metropolita Police

  - Supreme Public Prosecutor's Office

  - Youngjong-Do International Airport

  - Ministry of Justice

  - Korea Development Bank    etc....

    DualNET / IPChanger

  - Ministry of National Defense

  - Headquarter of Army

  - Headquarter of Navy

  - Headquater of Air Force

  - National Intelligence Service(KCIA)

  - The Others.

    NetSwitch II / IPChanger

  - Korea Securities Dealers Association

  - National Agricultural Cooperative Federation

  - Financial Supervisory Commission

  - Korea Stock Exchange

  - The Bank of Korea.

  - Korea Exchange Bank

  - Sinhan Bank

  - Seoul Bank

  - University of Kangnam

  - Patima Hospital

  - Chungbuk National Univ. Hospital. etc...