Tool that says whether IP addresses are routable or reserved

[Andre Majorel <aym-naibed@teaser.fr>]

Is there a tool which would take IPv4 addresses on the command
line and say whether or not they are regular and routable ?

host(1) is not very useful for that as it doesn't seem to
distinguish between an address which happens not to used by a
domain name at this time (eg 9.9.9.9) and one which could never
be (eg 192.168.0.1).

Thanks in advance.

-- 
André Majorel <http://www.teaser.fr/~amajorel/>
alias reportbug='cat >/dev/null'