Is there a website that will help me locate someone who probably does not have a main phone under their name?

[CvAgent]

Is there a website that will help me locate someone who probably does not have a main phone under their name?
I am trying to find someone from highschool, and they do not have a number listed under their name. I am pretty sure about that, and i really dont feel like calling the school we went to.

any help would be appreciated.

thanks