Also known as *69. A calling feature from the LEC which allows you to hear the telephone number of the last incoming call by dialing *69 on a touchtone phone. It also allows you to call back the last incoming number by prompting the central office to redial the number. If the line is free, your call will go through. If it is busy, then call return will check the line for 30 minutes and let you know when the line is free with a distinctive ring.