DNS Lookup
Query DNS records for any domain against a resolver of your choosing.
What this does
Queries public resolvers directly over the DNS wire protocol, so the answers include TTLs as returned rather than as remembered by a cache in between. Pick Compare all to ask every resolver at once and see where they disagree — useful while a change is propagating.
Alongside the records it finds the zone apex and its nameservers, follows CNAME chains, and flags a few common mistakes: duplicate SPF records, and MX records pointing at aliases.