I have my contact number in my About area and the Facebook search engine returns just my profile, so you understand that's the best one.
Search By Phone Number Facebook
But here's a search I did by telephone number for someone I'm not connected to and who doesn't have their telephone number in their public profile. (Sorry for the blurring-- to safeguard the innocent victim of my research.).
Ways To Hide Contact Details on Facebook.
1. Once again go to your account, click the [Accounts] tab and select Personal privacy Settings link.
2. On the Privacy Settings page, scroll down and click Customize settings link (see pic. above).
3. On the Customize settings page scroll down to discover Contact info section and it will show you all the contact info and whom you permit to see it.
4. Click any one of the contact details. like mobile number and choose the kind of people who can see/access it. If you wish to conceal your contact number on facebook entirely from everybody select Customize. (see above).
5. In the next window under Make this visible to you can choose the alternative Only Me or the others.
Search By Phone Number Facebook, By selecting "Just Me" youre specifying that just you can see that contact details on your facebook profile, while the remainder of the world will not see it at all or access from their phonebook page, unless you define certain individuals in the above action to see them.