The "list ars route xxxxxxx" will give you the route pattern. You could also do like liquidVW is saying and "change ars dig 1" then place the 10 digit number there and strip it to a 7 digit number.

Mike Jones
"A people that values its privileges above its principles soon loses both."
- Dwight D. Eisenhower (1890-1969), Inaugural Address, January 20, 1953