Systems and methods of recommending that two people form a link on a social networking system uses activities conducted by a first person on a telephony system to determine the names of individuals and businesses that the first person has communicated with through the telephony system. This list of names and individuals is then compared to the names of individuals and businesses that are members of the social networking system. If the first person is communicating with individuals or businesses who are members of the social networking system, a recommendation that they form a link on the social networking system is issued to one or both parties.