DCI numbers were part of a legacy account system. Wizards Accounts do not have DCI numbers associated with them. As of December 2022, Magic tournaments no longer use DCI numbers, and players can no longer log into the Organized Play Account system. The Wizards of the Coast Customer Service team can no longer assist with DCI number lookups or similar Organized Play Account requests.
To learn more about Wizards Accounts, please visit our Wizards Account FAQ.