On 24/04/2018 17:28, Jim Reid wrote: Hi Jim,
> Well, I would say that if the name’s in the query traffic, that > means it’s “in use”. For some definition of that term. YMMV. I respectfully disagree. A human may idly query the name ns-v6.ripe.net out of curiosity. If they happened to use one of these shiny new resolvers that do pre-fetching to keep an entry alive, the queries for that name will persist for a long time, and perhaps even forever. I don't consider this to be genuine usage. Geoff Huston has done some interesting research in this area and shown that even single-use unique names, generated for a special purpose, end up being queried for weeks or months thereafter. Regards, Anand
