In the past, 16 digit D2 CD-Keys were “claimed” by registering them to a battle.net account, whereupon they would be turned into 26 digit keys.
I have a four 26 digit keys that I would like to “claim” to four battle.net accounts. However, since they already exist in 26 digit format, I don’t see anywhere on my battle.net account page where I can “claim” (or bind, register, associate, whatever you’d like to call it) these 26 digit keys to a battle.net account.