How to mask my link with a facebook subdomain

[FallAngel666]

Hello I want to mask my link (blackhat) with a facebook subdomain , how can I do it? :
This a example of link:

Войдите на Facebook

Войдите на Facebook, чтобы общаться с друзьями, родственниками и знакомыми.

l.facebook.com

Would be great if someone can help me please.