Why?
daves:~ # route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
191.255.255.0 * 255.255.255.0 U 0 0 0 venet0
loopback * 255.0.0.0 U 0 0 0 lo
default 191.255.255.1 0.0.0.0 UG 0 0 0 venet0
rfc3330 says:
191.255.0.0/16 - This block, corresponding to the numerically highest to the former Class B addresses, was initially and is still reserved by the IANA. Given the present classless nature of the IP address space, the basis for the reservation no longer applies and addresses in this block are subject to future allocation to a Regional Internet Registry for assignment in the normal manner.