For Bellsouth people:

Below is a list of the most common TouchStar commands and their uses:

Anonymous Call Rejection Activate *77
Anonymous Call Rejection Deactivate *87
Call Block Activate *60
Call Block Deactivate *80
Call Return Activate *69
Call Return Deactivate *89
Call Selector Activate *61
Call Selector Deactivate *81
Call Tracing Activate *57
Call Waiting Deactivate *70
Calling Number Delivery Blocking - per call blocking of your Caller ID information Activate *67
Preferred Call Forwarding Activate *63
Preferred Call Forwarding Deactivate *83
Repeat Dialing Activate *66
Repeat Dialing Deactivate *86
*50 Deactivate Call Block (Prestige Service)
*51 Deactivate Call Selector (Prestige Service)
*53 Deactivate Preferred Call Forwarding (Prestige Service)
*56 Deactivate Repeat Dialing (Prestige Service)
*58 Activate Anonymous Call Rejection (Prestige Service)
*59 Deactivate Call Return (Prestige Service)
*68 Deactivate Anonymous Call Rejection (Prestige Service)
*98 Access Voice Mail