How to track a androids location using phone number? Okay so my phone was stolen and is off locations off whatever can't track. But I do know who stole it and I do have his number is there a way to track his phone?
There is no way for a law abiding citizen to track the location of a phone by using the phone number. 

Your options are to report the theft to law enforcement and see what they can do. Or contact the person on your own, and hope they give it back. 

Both options will work better if you have some proof that this person stole the phone.

(I don't want to let you down, but the chances of law enforcement putting too much effort into a lost phone, are very small. They will most probably not be able to go as far as getting a warrant to search for the location of the thief, as pointed out by @acejavelin in a comment)