Santa's number

The conversation went like this?

Craig: Behave, or I'll tell Santa on you.
Princess: Do you have Santa's phone number?
C: 1-800-SANTA
P: The phone only has numbers, how do you dial letters? Is that *really* his number?
C: No, but I know his number.
P: How'd you find out his number?
C: Its something grown-ups know.
P: When did you find out, in college?
C: No, when you have a kid at the hospital, the nurses tell you.