trap and trace device

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A trap and trace device is a device or process that records the sources of incoming signals to a specific phone or computer. This is often used by law enforcement as the advanced counterpart of Caller ID. A trap and trace device identifies the phone numbers or Internet addresses of incoming signals, but does not include substantive information transmitted by those signals. 

Compare to: Pen register

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[Last updated in June of 2024 by the Wex Definitions Team]