flake calling ID

[TekOne]

I received some call and txt from a similar #, but either no one answer or some dude that i no even know. Sometime i received threading msg on txt or voice msg from similar friend's #. Then i call him back and sweat that he never make certain call and I trust his personalize. A friend know since high school. Are there apps exist can use make friend's phone # and flake out the original caller id? What's alert way to stop those harassment?