Roland Perry wrote: [...]
Can we use something on the ripe.net zone?
It seems unlikely that such a domain would have nameservers outside the I* community, and many (I have looked) have six or more NS, which is also a bit unusual and potentially giving the wrong impression.
(And if you mean literally within the ripe.net zone, I already noted that it has six NS, located at RIPE-NCC and at I* colleagues: nic.fr, apnic.net, isc.org and arin.net)
In a former job we wanted an example domain for use in marketing material, so we registered one but never used it. I checked just now the domain is still registered to the successor business. If a commercial organisation can keep a domain registered for 17 years following an aborted marketing campaign I am confident that people in this community could register and maintain a domain for use in educational material for as long as the material remains relevant. Regards, Leo Vegoda