I suppose a bonus question would be, how many prophets are mentioned in the New Testament? Only living prophets known to the leaders of the Christian church, list both the true ones and the false ones.
But I'll play along. Look in Acts chapters 11, 13, 15, 21 for a few examples, even in some places including specific names, of both true and false living prophets known to the Church.
How can this be? Prophets after the death of Christ?