Some businesses may wish to block their phone number from being displayed on the recipient’s caller ID screen. This is especially common if companies are concerned that consumers will not answer their telephones if they see that the call is coming from a business.  Note that it’s impossible to block your caller ID when dialing 911, or if you are calling from a vanity (800) number.  Though we don’t recommend this, you may dial *67 before the phone number to have your caller ID blocked, or change your settings, if available, to avoid showing caller ID.  If you do this, your caller ID will appear as “Unknown” or “Anonymous” -- which may not make the caller any more eager to pick up.  It’s much better to choose a customized caller ID.