Here’s a great tip (via a LifeHacker reader) to keep your cell phone number from showing up on caller ID:

With your cell, just start the number you are calling with the *67, as if the phone number begins with those three digits. The important thing to remember is that you will need to put the 1 in before the area code, as cells don’t normally need the 1.

For example, enter *6719175551212 before hitting the talk button will lead the receivers caller id to read “restricted.”

As Johnny Carson would say, “I did not know that.”