Caller ID allows you to see who's calling before you answer the phone. After the first ring, information about your incoming call will automatically appear on your Caller ID screen.
Note: If you see "Private" or "P," the caller may have blocked the display of their name and number by pressing *67 before placing the call. If you see "unknown name," "unknown number," "out of area," or "O," the caller is in an area that does not support Caller ID. Not all phone companies support the Caller ID of callers from other companies. You may see the caller's state and phone number, or just the phone number if the other company does not support Caller ID. You need a Caller ID display telephone or an add-on display to see Caller ID.