Caller ID was around for quite a while before 2002. It looks like the first companies rolled it out in the late 80's. But, it's funny that you chose 2002 becaus

Caller ID was around for quite a while before 2002. It looks like the first companies rolled it out in the late 80's. But, it's funny that you chose 2002 because that's the year when phreakers learned how to spoof the system. It was always theoretically possible because phone companies would make test calls to customers with information like "BENJAMIN FRANKLIN (123)456-7890". In other words, it was obvious that the Caller ID system was trivial to manipulate. https://en.wikipedia.org/wiki/Caller_ID_spoofing https://en.wikipedia.org/wiki/Caller_ID_spoofing