Ugly:
core1.lax2.he.net> traceroute ipv6 2601:0:981:ae00:310e:d26b:151c:c29a numeric

Tracing the route to IPv6 node 2601:0:981:ae00:310e:d26b:151c:c29a from 1 to 30 hops

  1   539 ms  663 ms  210 ms 2001:559::385
  2   259 ms  824 ms  112 ms 2001:558:0:f558::1
  3   794 ms  125 ms 1014 ms 2001:558:0:f920::2
  4   762 ms  162 ms  873 ms 2001:558:40:24::2
  5   620 ms  501 ms  341 ms 2001:558:42:2f::2
  6   771 ms  479 ms  429 ms 2601:0:981:ae00::1
  7   770 ms  381 ms  818 ms 2601:0:981:ae00:310e:d26b:151c:c29a

core1.lax2.he.net> traceroute ipv6 2607:f2f8::102:0:0:0:501 numeric

Tracing the route to IPv6 node 2607:f2f8:0:102::501 from 1 to 30 hops

  1    *       *       *     ?
  2    *      594 ms  616 ms 2607:f2f8:0:102::501
# Entry cached for another 50 seconds.