In one embodiment, a method includes receiving, by a first computing device from a tracking system server, a request to locate a tracking device, the request comprising an identifier for the tracking device. The method includes receiving a signal from a tracking device in an environment of the first computing device, the signal including an identifier for the tracking device in the environment of the first computing device. The method includes determining that the tracking device in the environment of the first computing device is the tracking device of the request to locate the tracking device by comparing the identifier for the tracking device received from the tracking system server and the identifier for the tracking device in the environment of the first computing device. The method includes providing, to the tracking system server, the location associated with the tracking device and the identifier for the tracking device.