Caller ID is a telephone service in the United States that transmits the caller's name and/or telephone number to the called party's telephone. Today most telephones come with caller ID capabilities, and telephone companies regularly offer the service for little or no cost as part of their monthly service packages. Caller ID consists of two elements: the calling number and the subscriber name. This information appears on a person's telephone or display unit. Caller ID service lets you identify yourself to the person you are calling and lets you see who is calling before you answer the phone. It is estimated that more than half of all households in the United States have caller ID. Because this technology allows people to see who is calling, ...

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