To check which Nexon account is linked to your Steam profile, you need to log into your account via the official Nexon website portal using your credentials. Once signed in, navigate to the Account Settings or Linked Accounts section of your user dashboard, where the platform displays any third-party external services—such as Steam, Google, or social platforms—currently connected to your profile. If you encounter issues or find discrepancies, you can contact Nexon Customer Support through their help center to request account unlinking or security verifications.