1. A method for supplying alternative contact information when a communication attempt is unsuccessful, comprising: receiving an inquiry from a communication device, the inquiry comprising an indication of an unsuccessful communication attempt and an identifier or address corresponding to the destination of the failed communication attempt; determining if the identifier or address is associated with a group; if the identifier or address is associated with a group, generating a response that includes one or more other identifiers or addresses associated with the group; and transferring the generated response to the communication device; wherein the inquiry further includes a conditional requirement, and wherein the method further comprises, if the identifier or address is not associated with a group, generating a response that includes one or more other identifiers or addresses that meet the conditional requirement.