Class E addresses in the wild

Fri Mar 22 00:10:33 UTC 2013

On Thu, Mar 21, 2013 at 12:06 PM, George Herbert
<george.herbert at gmail.com> wrote:
> It is (or was) fairly commonly in use among internal nets which
> overflowed RFC 1918 or have to internetwork with other heavy users of
> RFC 1918 space.  I know of at least two service providers and one cell
> network who were using it for that 3 years ago.
>

I am pretty sure Class E is completely defunct and not used anywhere
since Cisco and Juniper routers do not forward the packets (circa 2008
testing) and no known host accept it as a valid address, AFAIK.

CB

> Someone leaking internal routes for such?  Or attempt to hijack the space?
>
> Only the Shadow knows...
>
>
> On Thu, Mar 21, 2013 at 11:17 AM, Donald Eastlake <d3e3e3 at gmail.com> wrote:
>> No authorized IETF use that I know of. See
>> http://www.iana.org/assignments/ipv4-address-space/ipv4-address-space.xml
>>
>> Thanks,
>> Donald
>> =============================
>>  Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
>>  155 Beaver Street, Milford, MA 01757 USA
>>  d3e3e3 at gmail.com
>>
>>
>> On Thu, Mar 21, 2013 at 2:09 PM, Buz Dale <buzdale at gmail.com> wrote:
>>> Is anyone else seeing a lot of Class E address space (240.0.0.0/4) at their
>>> borders?  Has this space been reinstated in some as yet unknown to me RFC?
>>> Thanks,
>>> Buz
>>>
>>> --
>>> Buz Dale
>>> buzdale at gmail.com
>>> GMT -5
>>> --
>>>
>>>
>>>
>>> --
>>> Buz Dale
>>> buzdale at gmail.com
>>> GMT -5
>>> --
>>
>
>
>
> --
> -george william herbert
> george.herbert at gmail.com
>