Question about subdomains and ages.

Hi all,



I need some expert advice.



I will move my main website that is at www.z.com to x.z.com.



I have read that SE take the subdomains as indepent places, they index them separately from the main domain and so on.



So i was wondering if i move my website…



Can i loose my “domain age” in that move? or the SE will see the subdomain with the same age of the main domain? I dont wanna be at the sandbox again :S



Sorry, my english is not the best, hope you understand me.



Thank you in advance.