DNS record lookup

What you are looking at

Answers come from public recursive resolvers, so this is what an ordinary client on the internet sees, cache included. The TTL column counts down: it is the number of seconds this answer may still be reused before a resolver asks again.

Names starting with an underscore are not hostnames; they carry policy. _dmarc holds your DMARC policy, _mta-sts and _smtp._tls the transport security ones, and selector._domainkey the public half of a DKIM signing key.