Find a variety of cards that allow you to make calls anonymously. By placing a call using one of the cards below, your identity is automatically protected and the receiving party can not see who is calling them. This feature can even be used to place a call through “anonymous ID blocking” systems. The receiving party’s Caller ID does not detect your real phone number. Their Caller ID will display either an “Unavailable” message or a preset, general phone number of the switchboard. Go to Anonymous Calls link.