I want to check if a user is banned, is there a place that i can go or do i have to ask the global moderators directly?
I agree with grue's reply. However, You could also check for gaps in user post history of roughly 3,7,14,30,60 days (the same duration of bans).
To check an user post history,
https://bitcointalk.org/index.php?action=profile;u=387574;sa=showPosts, replace your uid (the number after u=) with the one of the user account you're checking.