Location　service　is　an　efficient　solution　to　handle　actor　mobility　in　wireless　sensor　and　actor　networks.　Geographic　hashing　location　service　(GHLS)　is　a　flat　hashing-based　protocol　which　has　better　energy　efficiency　than　other　location　service　protocols.　Nevertheless,　GHLS　suffers　from　unbalanced　energy　consumption　due　to　the　fixed　hashed　region.　In　this　paper,　we　propose　a　new　protocol　termed　as　GHLS-R2　to　achieve　load　balance　in　two　aspects:　location　server　rotation　and　energy-aware　geographic　routing.　Simulation　results　show　that　GHLS-R2　protocol　can　effectively　balance　the　energy　consumption,　and　hence　prolong　the　network　lifetime　significantly.　©　2019　iJOE.