Help: domain propagation

[Scientia]

Hello

If there are better NG's for this question, please let me know.

About domain propagation.
Is it due to my web server or to NIC authority?

In my case, NIC authority routed my domain to the correct DNS
more than 7 days ago.
But the set-up of my domain has been made only 3 days ago.
So, when did propagation start? 3 days ago or 7 days ago?!

Final question.
I want to set up also DNS wildcards in my account.
Will they have a propagation delay also?
(I don't think so, but I am not sure).

Thanks!

Fabrizio
scientia at technologist.com