The Department of Work and Pensions, UK has an entire /8

Wed Sep 19 03:13:29 UTC 2012

On 9/18/12, Jeroen Massar <jeroen at unfix.org> wrote:

> Some people have to learn that not every address is only used on the
> Internet. According to the above there will be large swaths of IPv4 left
> at various large organizations who have /8's as "they are not announced"
> or as the article states it "as there is no ASN".

When IPv4 exhaustion pain reaches a sufficiently high level of pain;
there is a significant chance people who will be convinced that any
use of IPv4 which does not involve  announcing and  routing the address
space on the internet is a "Non-Use" of IPv4 addresses,

and that that particular point of view will prevail over the concept
and convenience
of   being allowed to maintain unique registration for non-connected usage.

And perception that those addresses are up for grabs,  either for
using on RFC1918
networks for NAT,  or for insisting that  internet registry
allocations be recalled and
those resources put towards use by connected networks......

If you do have such an unconnected network, it may be prudent to have
a connected
network as well,  and announce all your space anyways  (just not route
the addresses)

> Greets,
>  Jeroen
--
-JH