A wireless communications signal is sampled to obtain one or more data packets. Identifying data is then retrieved from the wireless data packets that uniquely identifies a proximately located computing device that transmitted one or more of the data packets. A server computer is then queried with the identifying data to obtain additional information regarding the proximately located computing device. The additional information regarding the proximately located computing device may then be utilized to obtain data regarding an owner or user of the proximately located computing device. This information may be display within a graphical user interface and exposed to application programs.