Hi Shumon, At 12:46 PM 03-02-2020, Shumon Huque wrote: >Didn't we discuss this recently? Sorry, I missed that thread. >I assume this is the Cogent<->Hurricane Electric IPv6 peering issue. >See the long thread that starts here (short summary: dnsviz is >singly homed to HE so can't reach Cogent IPv6 servers): Thanks for the feedback. Regards, -sm