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Hi - great post, thanks. I had a question about the heat map. What is the /32s and 10Q, can you explain it some more please?

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Hi -- glad you like the post. /32s are individual DNS resolver IPs we observed in each country from among the sample we took (half a percent of the traffic we saw during a 24h period).

The >10Q column is how many of those resolvers we saw that did >10Q from among our sample -- you can see there are many fewer resolvers that are doing even moderate amounts of traffic.

Er -- I should have said, that did more than 10 queries from among our sample.

that's a huge drop off, right?

Certainly a huge drop-off. There is a lot of noise out there -- a lot of "resolvers" doing very few queries, whether because they have very few users, or because they're one-off special purpose resolvers. Vast majority of the internet is really serviced by a few thousand major DNS resolvers. Obviously Google/OpenDNS are chief among those, but Comcast and other major ISPs account for most of the volume, as you'd probably expect.

Edit: whoops, meant to reply to Chris below.

Thank you for the quick reply!

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