1. A method comprising: receiving, by a server, a query from a first device, the query including an identifier associated with a second device, information regarding a geographic radius, and information regarding a geographic position; determining, by the server, a first proximity, associated with the query, based on the information regarding the geographic radius and based on the information regarding the geographic position; determining, by the server, a second proximity associated with the second device; determining, by the server, a value based on the first proximity and the second proximity, the value indicating a likelihood that the first proximity is within the second proximity; and providing, by the server, proximity information to the first device, the proximity information including the value.