Not supported on standard Whois. Try this instead: http://irrexplorer.nlnog.net/search/51551
Nick Sent from my iWotsit. > On 14 Aug 2018, at 09:40, James Bensley <jwbens...@gmail.com> wrote: > > Morning All, > > What am I doing wrong? I've had most of a coffee and still can't see > what I'm missing. > > How do I search an IRR (RIPE specifically) for the AS-SET that > contains $ASN using native "whois" ? > > For example - AS51551, I want to peer with them so I want their AS-SET > so that I can accept their routes, and all downstream customer routes. > I personally know it is called "AS-UPDATA" but I can't find any option > that will let me find that without knowing it in advance, or by > guessing it, e.g. most AS-SETs are called NETWORK-AS, AS-NETWORK, > ASNETWORK etc. > > Is this not possible within the native whois client? > > Cheers, > James. >