A method and service for enabling routing of calls to a user is described. Connection rules for a user are established, and organisational or social network data is obtained from the user for use in determining a social network connection graph. On receiving a request to route a call to the user with organisational or social network data associated with the caller, a matching directory service (1) determines from the social network connection graph and the connection rules whether or how to provide call routing data in response to the request.