Serials And Keys Did Someone Use My Serials Keys?

Did someone use my serials keys? - serials and keys

Ok I have a CD with some keys for programs and operating systems such as
Microsoft Office
Windows XP and there is a way to determine what other teams used to this series or if you use the program I pay?
Basically I just want to know if I know who used my serial number to activate their version of the program?
Do you think that someone has taken my series
Thanx