A system and method for improved routing in autonomous systems includes identifying one or more first edge routers for an autonomous system, selecting one or more second edge routers from the one or more first edge routers, determining a third edge router, forming a first edge router list including all of the one or more second edge routers except for the third edge router, forming a first reachability message, and transmitting the first reachability message. A first prefix is reachable using the one or more second edge routers. The third edge router is associated with a first path for reaching the first prefix. The third edge router is selected from the one or more second edge routers. The first path is a best path for reaching the first prefix. The reachability message includes the first prefix, information associated with the first path, and the first edge router list.