How to block caller id with ATT?

# == # Step 1 Press *67 on your phone and listen for a dial-tone. # Step 2 Dial the number you are calling. # Step 3 Repeat this process for each call that you wish to block your number on, as this method will block your number for this call only. We occasionally use this at Kallen Web Design ( www.kallenweb.com ) if it ever seems like our regular calls are being ignored.