How to use Call Trace (from Verizon's website)

Use Call Trace immediately after a call. It will trace the last call you received.

After receiving a call you want to trace, hang up the receiver to end the call.

Pick up the receiver and listen for the dial tone.
You must trace the call before another call is received.

Press (rotary phones dial 1-1-5-7) and follow the voice-recorded instructions.

Stay on the line and listen for a recording that tells you if Call Trace was activated and if the call was successfully traced.

Once you have successfully traced the required number of calls (differs by area), contact your local law enforcement agency and obtain a complaint number.
Note: You must repeat these steps each time you want to trace a call.

Taking further action by establishing a case

Some states require you to trace two or more calls in order to establish a case.

If you want to establish a case, call the Verizon Unlawful Call Center at 800-518-5507 (TTY: 800-254-5959), Monday - Friday, 8:30 a.m. - 5 p.m. with your complaint number to open a case.

If you want to hear a recorded message about how to use Call Trace, call 877-TRACE4U 877-872-2348) at any time.

Verizon will store Call Trace information for 90 days. You will be notified within 30 days if there is enough Call Trace information to be sent to a law enforcement agency. The action taken by law enforcement may vary by area. The records of all traced calls will be released to a law enforcement agency only.
 Oct 10th, 2007