Re: Tool that says whether IP addresses are routable or reserved

[Henrique de Moraes Holschuh <hmh@debian.org>]

On Sat, 10 Sep 2016, Joe wrote:
> > - 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.

https://tools.ietf.org/html/rfc6890

http://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml

http://www.iana.org/assignments/ipv4-address-space/ipv4-address-space.xhtml

These are canonical and authoritative.

IPv6 has them, too:

http://www.iana.org/assignments/iana-ipv6-special-registry/iana-ipv6-special-registry.xhtml

http://www.iana.org/assignments/ipv6-address-space/ipv6-address-space.xhtml

There are also the registries for multicast space, etc.

-- 
  Henrique Holschuh