WHOIS Domain Lookup

IPOK dev tools provide fast network diagnostics and data conversions, including IP purity, subnet risk, DNSBL blacklist, and ASN routing lookups.

Want to know who registered a domain, when it expires, what status locks it carries, and which DNS it uses? This tool queries RDAP (the structured next-gen WHOIS) live and returns the registrar, registration / expiry / last-update dates, EPP status codes and nameservers.

Registration data is just step one: what often decides whether a domain is trustworthy is whether the server IP it resolves to is clean — datacenter or not, flagged as proxy, on a spam blacklist. That's what determines if its mail lands and whether platforms flag it. So after WHOIS, check the purity of its resolving IP.

The query goes through IPOK's Worker to the RDAP upstream, which processes the domain. Responses may be edge-cached for one hour, and the requester-IP daily quota follows the privacy policy.

Check the purity of the server IP this domain resolves to →

Check your own IP — purity, risk score, native vs datacenter, leaksCheck IP →

FAQ

What's the difference between WHOIS and RDAP?

RDAP is the modern replacement for WHOIS: it returns structured JSON (not free text) with consistent, machine-readable fields. This tool uses RDAP, so results are cleaner.

Why can't some domains be found?

It may be unregistered; or the TLD has no public RDAP (e.g. some country-code domains like .cn). The tool tells you 'not found' vs 'TLD unsupported' separately.

Can I see the registrant's real details?

Most .com domains redact the registrant for privacy / GDPR, so you'll see the registrar but not the individual registrant — that's normal.