There’s an undocumented DBCC command ‘DBCC DBINFO’ that gives us lot of information about the database.
One of the extremely useful info this command returns is the last time DBCC CheckDB ran without any errors.
To find this info, run
DBCC TRACEON (3604)
DBCC DBINFO('MYDATABASE')
DBCC TRACEOFF (3604)
Scroll down to find “dbi_dbccLastKnownGood” value. When you do DBCC DBINFO, along with lots of other information, you will get dbi_dbccLastKnownGood result. It is a date time value, which essentially means, the last time the CHECKDB went well without any corruption. This could be particularly useful piece of information, when your database is corrupted and you can find out the last time your database is corruption free(this information will be up-to-date only if you run DBCC CHECKDB regularly).
SQL Server Repository 