The most I seem to be able to find is that the 90.0.0.x range is
"reserved".  Not "reserved for use as a private range", just "reserved".

  At some point, recognizing that there are virtually no real public
networks that need an entire "Class A" address block (16 million hosts in a
single subnet), the IANA (Internet Assigned Numbers Authority) reserved
everything from 64.x.x.x through 126.x.x.x for delegation and sub-
allocation, and it's possible that the "reserved" status of 90.0.0.x is the
last remnant of this reservation.
  The actual reservation currently covers everything from 89.x.x.x through
95.x.x.x.  Nobody seems to be claiming credit for the "90.0.0.x is private"
myth.

  There are enough people abusing this range as a private block that
allocating it as a public block may never happen.  But there's no reason
anybody needs to add themselves to the mess.

David Gillett


On 28 Jan 2005 at 9:58, Peter Shkabara wrote:

> Thank you David. As I expected, you gave a very nice presentation. You also
> got me to investigate the 90.0.0.n range. It does appear the this range is a
> myth and not truly reserved. Here is a link I ran into:
> http://www.bcmaven.com/networking/myths.htm
>
> If anyone has more info on the 90.0.0.n range, please post. In particular,
> how the myth get started, or a reference to where it is reserved would be
> nice. If memory serves me, I originally found it in a Ziff-Davis
> publication, as well as a few other places, but not a definitive source.
>
> Peter
> -----------------------------------------------
> The NoSpin Group
> [log in to unmask]
>
> > -----Original Message-----
> >   The most common private ranges, defined by RFC 1918, are
> >
> > 10.x.x.x (1 Class A network)
> > 172.16.x.x - 172.31.x.x (16 Class B networks)
> > 192.168.x.x (256 Class C networks)
> >
> >   APIPA (169.254.x.x (Class B)) is a special case defined
> > elsewhere, as is
> > (I believe) 192.0.2.x (Class C).  I'm not sure where, or even
> > if, 90.x.x.x
> > is defined.
> >
> > David Gillett (no final e...)
>
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