Usually on a credit report. Not necessarily on a credit monitoring service. I know places like USAA do not have that information, you have to pull your real report from the agencies directly.
On your CR, TU and EX will list a "date this is expected to be removed", you go back 7 years from that and get your DOFD, on EQ they list the DOFD. You may have to get more in depth CRs to get this information. Have you pulled your reports from annualcreditreport.com? These are your yearly free ones. Good Luck!