How to Permanently Block Caller ID
There are two ways to block caller ID on most phone systems. Block caller ID on a per-call basis by dialing a short code before the call, or block caller ID on all calls. Unlike per-call blocking, permanently blocking your caller ID number requires a change to your account. Most carriers require you to contact their customer support and add the feature. Some carriers charge extra for permanent blocking.
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Instructions
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Call your phone carrier. Contact cellular carriers by dialing "*611" from the phone. Find the number for land-line carriers on your bill or on the carrier's website.
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Select the option to speak to a customer service representative.
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Confirm your account identification with the customer service agent. He may ask for an account password or the last four digits of your Social Security number.
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Advise the representative you would like to block your outgoing caller ID. The representative will add the necessary feature to your account.
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Tips & Warnings
Verizon Wireless users can block caller ID permanently using their My Verizon account. Click the "My Plan" tab, then select "Add/change features." Check the box next to "Caller ID Blocking" and click "Next."
