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Re:Show HN: nextdns.io – A Combination of Cloudflare DNS and... by jamesog on Sunday May 26, 2019 @05:54PM (#20017799)
By default mtr will do reverse DNS lookups on all hops. Several of the traces I ran showed the route to nextdns's /24 transiting over NTT and from the DNS name you can figure out where each router is.

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