That would be AS42009 at LINX Manchester.

I presume it's either something emulating a DEC Tulip Ethernet chip or a fake MAC address (AA:00:00).

Edward Dore

Freethought Internet

From: Aled Morris <aled.w.morris@googlemail.com>
Sent: 07 November 2019 20:08
To: Edward Dore <edward.dore@freethought-internet.co.uk>
Cc: Sabri Berisha <sabri@cluecentral.net>; Compton, Rich A <Rich.Compton@charter.com>; nanog <nanog@nanog.org>
Subject: Re: Any info on devices that are running eBGP on the Internet?

On Thu, 7 Nov 2019 at 19:59, Edward Dore <edward.dore@freethought-internet.co.uk> wrote:

I just grabbed the following from our routers connected to LINX LON1, LINX LON2, LINX Manchester and LONAP (so this data is very UK centric):

...

1 DIGITAL EQUIPMENT CORPORATION

Kudos to whoever is running the VMS port of BIRD on their VAX-11/780

Aled