Systems and methods of analyzing message data. An embodiment is a method of analyzing message data including a plurality of messages associated with one or more users. The method is performed using a computing system comprising a computer storage medium and a computer processor. The system parses each message of the plurality of messages to identify a plurality of message segments. The system assigns the message segments to the one or more users. The assignment is based at least in part on a determination of whether each message of the plurality of messages is a reply message. The segments of the message are assigned to a reply user if the message is determined to be a reply message. The system applies a statistical model to the assigned message segments, to determine predicted locations for the users. The system outputs the predicted locations for the users.