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Look up domain registration details — registrar, creation & expiry dates, nameservers, DNS...
Look up every DNS record for any domain — A, AAAA, MX, TXT, CNAME, NS, SOA, CAA, SRV. Auto...
Type a name — see which TLDs are available for registration and which are already taken. L...
Verify any email address — RFC 5322 syntax, real MX records on the domain, disposable / te...
Verify any HTTPS certificate — issuer, subject, SANs, validity dates, key size, signature...
Look up any IP or hostname — location (country/region/city + map), ISP, ASN, reverse DNS,...