I’ve been using 188.8.131.52 as a DNS resolver and came across a domain that isn’t returning as expected: mamotransportation.com. I confirmed that it resolves at 184.108.40.206 and 220.127.116.11, but nothing is returned from 18.104.22.168 or 22.214.171.124.
It appears I’m hitting the DFW nameservers based on the results of the id.server lookup shown in the “have-problems-with-1-1-1-1” posting.
I don’t manage the mamotransportation.com domain, but A, MX, and TXT records seem to be setup correctly for it when I use other resolvers.
Any thoughts on what may be going on here?