How do you block a number with *67?

Dialing *67 before a phone number deactivates caller identification, or caller ID, and the system shows "private number" instead of an incoming phone number. Dial *67 and the desired number without adding any spaces between the numbers.

Dialing *67 before a phone number temporarily blocks caller ID when calling businesses and individuals, but it does not work when calling toll-free numbers and emergency services. In addition, some people ignore calls from blocked numbers. Cellphone carriers can permanently block caller ID if customers request this service. Carriers' customer service numbers vary, but dialing 611 typically works for those in the United States and Canada. Although permanent caller ID blocking is irreversible, dialing *82 before a phone number temporarily reactivates caller ID.