Nevermind....the database no longer includes the certificate number. I guess large numbers of pilots still have their SSN as the certificate number.
Actually, the database does not contain the specific certificate number. It only contains the pertinent ratings of the individual, latest medical info and the address. (which you can request be deleted)
. . .and, as I'm not one to immediately believe the information is to be used for something nefarious, it's always a possibility.