Some other phone number searches that might be of interest:
https://www.facebook.com/search/people/?q=%2B########## (for some reason the search added a one to the start of the number - but a +and then the number in the FB search bar (no spaces, no () ) should work.

True People:
https://www.truepeoplesearch.com/results?phoneno=(###)###-####
Replace the # with the number

Fast People:
https://www.fastpeoplesearch.com/###-###-####

Burner
https://challenge.burnerapp.com/?number=#########