On Tue, Oct 12, 2021 at 11:21:44AM -0400, Keith Mitchell <keith at dns-oarc.net> wrote a message of 22 lines which said: > > (192.112.36.4, UDP_-_EDNS0_4096_D_KN)". > > > > Testing G-root/192.112.36.4 > This might be a known intermittent IPv6 routing issue with DNSviz, do you > see this problem for v4 and/or v6 ? v4