For identifying an unknown contact, a system, apparatus, method, and computer program product are disclosed. The apparatus, in one embodiment, includes a processor, a memory that stores code executable by the processor, the code identifying an incoming call from an unknown contact, collecting relationship information regarding the unknown contact, and determining a relationship to a user based on the collected relationship information. In certain embodiments, the apparatus also includes code that provides a notification based on the determined relationship. In some embodiments, the apparatus also includes code that shares the determined relationship with one or more stored contacts.