On Sun, Mar 12, 2017 at 03:54:51PM +0100, Stephane Bortzmeyer <bortzmeyer@nic.fr> wrote a message of 7 lines which said:
A quick test with a thousand probes seem to indicate that less than a dozen of all the probes use an alternative DNS root (or, more stricly, use a DNS resolver which is configured for an alternative root).
The only alternative root used seems to be OpenNIC.
Note that it may not be a conscious choice by the probe's DNS resolver operator: it could be hijacking. For instance, probe 32001 gets an answer from the root name server B in 3 ms, while traceroute shows a correct delay (B-root is only in the USA). And this answer is for the OpenNIC root, so this answer is certainly not from the real B-root. (This operator, AS 23860, does other funny things.)