Nowadays, everyone has caller ID.
You dial the wrong number get no answer and people call you back (thinking it's some one important they don't recognize the number). Then I have to tell them (sigh) "sorry no one called you from this number." Then they repeat the number off the caller ID and I tell them, "nope this is xxx- xxxx" (I just change one number around). Then they call back again and I don't answer.
Of course, this is all bullshit. I just wanted to see how many parentheses I could use in one paragraph (yeah!)