U   Up: The route is active.
H   Host: The route destination is a single host.
G   Gateway: Send anything for this destination on to this remote system, which will figure out from there where to send it.

S   Static: This route was configured manually, not automatically generated by the system.
C   Clone: Generates a new route based upon this route for machines we connect to. This type of route is normally used for local networks.
W   WasCloned: Indicated a route that was auto-configured based upon a local area network (Clone) route.
L   Link: Route involves references to Ethernet hardware.

R (reinstate route for dynamic routing)
D (dynamically installed by daemon or redirect)
M (modified from routing daemon or redirect)
A (installed by addrconf)
C (cache entry)
!  (reject route)