Look up DNS records

"All common types" queries A, AAAA, CNAME, MX, NS, TXT, SOA and CAA in parallel. For SRV or TLSA, enter the full name, for example _sip._tcp.example.com or _25._tcp.mail.example.com.

Enter a name or an IP, pick a record type and click "Look up".
Nothing is queried until you do.

What each record is for

A: The IPv4 address of a host.
AAAA: The IPv6 address of a host.
CNAME: An alias: this name is another name. Cannot coexist with other records at the same name.
MX: Mail servers that accept email for the domain, with a priority (lowest is tried first).
NS: The authoritative name servers of the zone.
TXT: Free-form text: SPF, DKIM keys, DMARC policy, domain verification tokens.
SOA: Start of authority: primary server, admin mailbox, serial number and refresh, retry, expire and negative-cache timers.
SRV: Where a service runs: priority, weight, port and target host (name form _service._proto.name).
CAA: Which certificate authorities may issue certificates for the domain.
HTTPS: Service binding for web origins: ALPN protocols, address hints, alias to another name.
SVCB: General service binding, the base of HTTPS records, for other services.
DS: Delegation signer: a hash of the child zone's key, published in the parent to chain DNSSEC trust.
DNSKEY: The public keys a signed zone uses (KSK and ZSK) to verify its DNSSEC signatures.
PTR: Reverse DNS: the hostname for an IP address, stored under in-addr.arpa or ip6.arpa.
TLSA: DANE: pins the TLS certificate or key of a service (name form _port._tcp.host).

Status codes: NOERROR (worked), NXDOMAIN (name does not exist), SERVFAIL (resolver could not get an answer, often a broken delegation or DNSSEC failure), REFUSED (server declined). AD means Google Public DNS validated the answer with DNSSEC.