Methods, systems, and computer readable media for enriching a Diameter signaling message are disclosed. In one example, the method comprises receiving, at a Diameter routing node, a Diameter signaling message that is associated with a mobile subscriber and includes mobile subscriber related information and querying a Diameter binding repository (DBR) using the mobile subscriber related information to select a network service node from a plurality of network service nodes configured to process the Diameter signaling message. The method further includes obtaining DBR information associated with the mobile subscriber from the DBR, wherein the DBR information includes an identifier associated with the selected network service node and modifying the Diameter signaling message to include at least a portion of the DBR information.