What level do mages learn the dalaran portal?

Classes Mage
1
As the title states.
2
Either 72, 74, 75 or 77, It's been so long since I last checked. If you got a flying mount already you can fly there or taxi if that option is open.
3
http://www.wowhead.com/quest=12173

Level 71
4
level 72 i think it was
5
fyi, in patch 8.0.1 it is 74.
6
Well thank god we necroed this 6 year old thread for that timely information