Why isn't *67 working

it is called phone spoofing. Chance are, if you answered the call, it would have been a computer. Foreign callers spoof the caller ID so that it looks like it might be from a local number but it is not. It did not come from the number that shows on your phone.

Actually in the instances I am referring to, it was a real number and a real person answered. The most recent was 254-345-5122. They answered when I returned the call (using *67); (the last time it was a real estate company inquiring about a property).

They clearly knew it was me returning their call.

(*67 is the AT&T star code to block at&t caller ID)

However...

If your phone number is in the contact list on their phone, it is still going to show your caller ID.

We understand the importance of being able to take advantage of all the features on your device, @Kennvmiller. Let's work together to figure out why you're unable to block Caller ID.

Thanks, @kdfederer and @formerlyknownas for the information. 

To block your Caller ID name and number for a single call only, enter #31# or *67 + the 10-digit number you are trying to dial. (Example: #31#.999.555.4444 or *67.999.555.4444.) You can also set your device to block or display your Caller ID on every call.

Caller ID blocking details:

If you're unable to use this feature by dialing *67 or #31, check myAT&T to make sure the Calling Name Block feature is active on your account:

1. Go to Manage Your Account.
2. In the Mobile Information Rate Plan section, go to Add Features; select the Calling Name Block feature .

On the device:

1. Set the CID settings to Hide.
2. Refer to Device Support and select the make and model of your device for step-by-step instructions.

Thanks for visiting our AT&T Community. Let us know how this helps!

Sydne, AT&T Community Specialist

Sorry, my question has not been answered. As I said earlier,

”

Actually in the instances I am referring to, it was a real number and a real person answered. The most recent was 254-345-5122. They answered when I returned the call (using *67); (the last time it was a real estate company inquiring about a property).

They clearly knew it was me returning their call.”

Also, if in settings on my iPhone, I disable “Show my caller  ID”, and I call a friend or family member, I show up as an unknown caller on their phones. 
However, businesses appear to see my number as they are able to identify me when I call them. See above. 

*67 does not call back the number that is *69.

We understand your frustration with wanting to know why *67 is not working, @Kennvmiller. Special thanks to our ACEs, @kdfederer and @formerlyknownas for their quick responses.

We want to help. Let’s meet in a Direct Message to discuss escalating your tech concerns. Please check your Direct Message Inbox (it’s the chat icon next to the bell icon in the upper right corner of the Forums).

We look forward to assisting you further. Thanks for reaching out to AT&T Community Forums!

Nelson, AT&T Community Specialist