This study focuses on regime complexity and state competition over global Internet governance (GIG). By conceptualizing and mapping international regime complexity, the actors in international issues concerning GIG are identified and studied and the dynamic interactions between states related to GIG are explored. In particular, the 2012 amendments to the International Telecommunication Regulations are used in our analysis of the factors that have contributed to the creation of disputes and cooperation among states in the GIG regime. The empirical study shows that the influence of powerful states, such as the US and China, can affect other states’ decisions on GIG. Furthermore, the findings reveal that democratic states with fewer regulations on business are more likely to support the Internet Corporation for Assigned Names and Numbers over the International Telecommunication Union.