Sometime ago I registered a third level .name domain of the type john.doe.name (this is just an example-my domain is not actually john.doe.name). I just realised that I could have registered the entire second level domain doe.name, which would grant me control of the third level one anyway.

Since I already registered the third level, doe.name is now "shared". I have 2 questions:

1) How do I check if I am the only one using the shared second level domain? (normal whois lookup doesn't give any result)

2) Can I "de-share" the domain and buy the entire second level domain?

Cheers!