To block your Caller ID name and number for a single call only, use *67 before calling. You can also set your device to block or display your Caller ID on every call.
Block Caller ID for one call only
Dial *67 on your phone.
Dial the 10-digit phone number you're calling.
Block or display Caller ID for all calls
If your device doesn't have the ability to block or display Caller ID on all outgoing calls, contact us to add this feature at no additional charge.
Caller ID blocking details
You can’t block your Caller ID when calling toll-free numbers or 911.
The phone setting to block or display your Caller ID remains in effect until you change it.
There's no additional charge to block or display Caller ID, an included feature on all AT&T Wireless voice plans.