If it is a "shortener" link eg t.co, bit.ly, tinyurl.com, goo.gl, you can use https://www.whatsmydns.net/url-unshortener
t.co
bit.ly
tinyurl.com
goo.gl
(Another variant of this question: https://webapps.stackexchange.com/questions/31748/how-can-i-track-down-t-co-links)