Internet addiction has become an issue of concern. Reality in the field, individuals are not aware of the condition of addiction to the Internet they experienced. The study measured the level of Internet addiction in adolescents. The study involved 175 teenagers scattered throughout Indonesia. Data were analysed used RASCH Model and Network Psychometrics. The results showed that most adolescents were at high, medium and low levels of Internet addiction. Of the 175 persons, there are 20 persons that are Outliers or Misfits. The analysis of network psychometry shows that the interaction between factor structure is superb. Based on the analysis of network psychometry also seen a positive and negative partial correlation of each item. The findings from this study can be an important input for counselors in establishing appropriate treatment to overcome the Internet addiction problem experienced by adolescents in Indonesia.