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Step 1
Dial *67 to block your residential phone number from appearing on a recipient's Caller ID system, for example, dial *67-123-555-555. This is called per-call blocking and will not carry-over to subsequent phone numbers and must be dialed each time a phone call is placed.
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Step 2
To block your information from being transmitted every time you make a call, per-line blocking, you must request it from your residential phone service provider. This is often the option for individuals who have an unlisted number, are or have been a victim of stalking or harassment, operate a domestic violence shelter, or wish to remain anonymous while calling hotlines to report crimes or request sensitive services. If you have this service you must enter *82 if you want to unblock a call you are about to make.
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Step 3
Understand that you cannot prevent your information from being transmitted when you make a call to an 800, 888, 877, or 866 number because the recipient is paying for the call not you. The FCC does prohibit parties with toll-free numbers from reusing or selling your information.
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Step 4
Know that your information will never be blocked when dialling an emergency service number such as 911.
