I don?t know whether my ISP keeps track of web sites I?ve visited or other personal online activity. Could a subpoena include information like that?
Any information that your ISP has may be subject to a subpoena, including information you may keep in calendars, preferences, “myXXX” systems hosted by your ISP, as well as log files. Different ISPs keep different kinds of records of customer behavior. Ask your ISP to be certain that you know what information they maintain about you.