Email DNS checker

Query A, AAAA, MX, TXT, NS, SOA, CAA and more through public resolvers, with TTLs.

Inspect a server's TLS certificate: issuer, SANs, expiry, key, protocol and cipher.

Follow a URL's redirect chain and inspect status codes, response headers and security headers.

Registration data for a domain or IP from RDAP: registrar, dates, status, name servers, network owner.