Tools
Registry and DNS lookups, read live each time rather than served from a stale cache. No account needed.
WHOIS lookup
Registrar, creation date, expiry and nameservers, read from the registry over RDAP.
DNS records
A, AAAA, MX, NS, TXT, SOA and CAA in one query.
SSL checker
Issuer, expiry, and whether the certificate actually covers the hostname.
Domain age
When a domain was first registered and how long is left on it.
IP address lookup
Network ownership and range for any IPv4 or IPv6 address, via RDAP.
Nameserver lookup
Which domains in our records run on a given nameserver.
Domain tracker
Free list of every domain you own, with emails before it expires or its nameservers change.