Apparatuses, Methods and programs are provided. A method may comprise receiving a first request to verify an identifier associated with a destination from a first requester, responding to the request with a response, the response indicating an existence of a physical address associated with the identifier, the response further comprising a list of authorized entities authorized to access information specifying the physical address, receiving a second request from a second requester to access information specifying the physical address associated with the identifier, determining if the second requester is authorized to have access to information specifying the physical address by analyzing the list of authorized entities corresponding to the identifier; and providing the physical address to the second requester if the second requester is authorized.