In the process of looking up places to practice for the General Class upgrade test. I came across info that if you were licensed as a Tech prior to 1987 you would be grandfathered for the General Class. My original call sign was KB2ISD, I don't have my original license to see when it was issued and I haven't had any luck fining this infor online. I've even looked at old call books that are online with no luck. I changed my call sign in 1989 to N2KDR, that info I have found online. The only reference to the KB2ISD is that it was my previous call sign. My question is. Does anyone know where to find what date my original call sign was issued to me?