As of 2019, domain registrations have migrated to name.com. If your domain was registered with Dyn at that time, it was likely part of the migration. Please use the following link to claim your domain with name.com and manage your services: https://www.name.com/welcome-to-name?cb=dyn_domino Please note, we are no longer able to access or maintain your domains.
Once you have claimed your domain, you will be able to log into their user portal and update the name servers to the ones listed on your account for the domain. Once they have been updated there, you will be able to manage its records via your account at account.dyn.com.
Oracle + Dyn