How to check an old clearance

In 2003 I worked for the DOD as a contract worker making the CAC’s when they first came out. I need to know what my clearance was back then, when it expired. As a civilian how can I find out this information? Thanks

If you have an FSO or security officer they can look into the system and provide you the dates. Of go here and request it: https://www.opm.gov/investigations/freedom-of-information-and-privacy-act-requests/