On Sat, 10 Sep 2016 19:58:50 +0200 <to...@tuxteam.de> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On Sat, Sep 10, 2016 at 07:36:11PM +0200, Andre Majorel wrote: > > 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). > > > - From your question I'm not sure this is the answer you are looking > for, but I'll give it a try. According to RFC 1918 [1], the following > address ranges are reserved for "private use": > > 10.0.0.0 - 10.255.255.255 (10/8 prefix) > 172.16.0.0 - 172.31.255.255 (172.16/12 prefix) > 192.168.0.0 - 192.168.255.255 (192.168/16 prefix) > > Note that this is for IPV4, IPV6 is probably a bit more complex :-) > There are a lot more reserved for other unspecified reasons. The list of more than 165,000 address blocks here http://software77.net/geo-ip/ contains quite a few listed 'reserved'. The list is frequently updated.
-- Joe
