lost ilok registration code

I have been working with Pro Tools MP9 + iLok for about 4 years now just as a hobby. Recently, I have been looking to get new plug ins however, I have run into an issue because I do not have the registration code associated with my iLok. I do have an account and the License Manager set up, but the plug-in authorizations require the registration code and where/when I purchased it? Any idea where I can get this information?
Thanks

"Registration Code: (e.g.999999999999999 - XXXX XXXX XXXX XXXX XXXX)"

lost ilok registration code