You can look up the owner of a cell phone number through online websites such as https://www.spydialer.com/
or spokeo for free.
Just enter the cell phone number online through those websites and then the cell phone numbers owners information will show up but to get more information you may have to pay a small fee.
Now as far as actually tracking the location of the cell phone through the cell phone number there's no legit way of doing so unless you own the cellphone and install GPS tracking software or apps on the cellphone.
Then you can go to the GPS tracking website and track down the location of the cellphone however if the app is turned off on the cellphone or the cellphone is turned off then there's no way of actually tracking the cellphone down.
If you need to have a cellphone tracked down then the cellphone company can usually track the location of the cellphone if there is a legit reason for the cellphone tracking and usually only law enforcement can have the cellphone company track down a cellphones location.