Your phone number will be shown on other phones as your "Caller ID." You may block your outbound caller ID by dialing with *67 followed by the number you'd like to call. For example, if you want to call 555-999-5555 and not have them see your phone number, you would dial *675559995555.
Some services may require that you don't call with a blocked number. You may hear an error such as "blocked numbers not allowed." For example, some toll-free numbers and emergency service such as 911 won't accept calls from blocked numbers.
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