Star 67 is a calling feature that allows you to hide your phone number when making calls. When you dial *67 before a phone number, your caller ID is blocked, and the person you are calling will not see your phone number displayed on their caller ID. This feature is useful in situations where you want to keep your phone number private, such as making a business call from your personal phone, or when you dont want someone to be able to call you back directly. However, its important to use *67 responsibly and not for illegal or unethical purposes, such as making harassing phone calls or prank calls. Note that *67 does not work for emergency services, toll-free numbers, or some international numbers. Also, some phone carriers may charge an additional fee for using the *67 feature.