WHOIS
Look up a domain's registration data — registrar, dates, nameservers and status — via RDAP.
What WHOIS/RDAP is
WHOIS is the historical name for the protocol that answers "who registered this domain": a free-text service on port 43, with no standardized format — every registrar answers differently, which always required a separate parser per registrar. RDAP (Registration Data Access Protocol, RFC 9082/9083) is the official successor, adopted by ICANN: the same question, but over HTTPS with a structured JSON response. This tool queries RDAP exclusively from the Nexinon server — the browser alone speaks neither protocol.
Why RDAP only
RDAP has been mandatory by ICANN contract for every generic domain (.com, .dev, .app etc.) since 2021, and its response follows a formal schema — no need to parse different free text per registrar. Classic WHOIS (port 43) still exists and covers some ccTLDs that haven't adopted RDAP, but that extra coverage has a real cost: a heuristic text parser per registrar, with no format guarantee. Nexinon decided not to include that fallback in this version — when the queried TLD has no known RDAP server, the tool says so explicitly instead of guessing at a text format.
Dates, statuses and registrant data
The three dates shown come from distinct protocol events: registration (when the domain was created), last update (any change to the record) and expiration (how long it's paid for). Statuses follow the official EPP vocabulary — for example, "client transfer prohibited" is a lock against unauthorized transfer, set by the registrant or registrar, not a sign of trouble. Registrant data (name, organization, email) only shows up when the registry doesn't redact it — most gTLDs hide that contact by default since the European GDPR took effect, so absence is the common case, not a lookup failure.
Frequently asked questions
Because the registrar redacted (hid) that data — the default behavior of most gTLDs since the European GDPR, applied regardless of where the registrant lives. When the data isn't redacted (some ccTLDs still expose it), the tool shows the registrant's name, organization and email.
It means the IANA's official bootstrap (the public list mapping each TLD to its RDAP server) has no entry for that TLD — usually a ccTLD that hasn't migrated from classic WHOIS (port 43) to RDAP yet. This tool queries RDAP only in this version (see "Why RDAP only", above).
It's an evaluated possibility, not a promise — it depends on how many users actually run into a TLD without RDAP. RDAP already covers every generic domain and a growing share of ccTLDs.
They're EPP (Extensible Provisioning Protocol) codes describing the domain's administrative state — most are protections, not problems. "client*" means a lock set by the registrant/registrar (e.g. against transfer or accidental deletion); "server*" means the same lock applied by the registry (rarer, usually due to a dispute or court order).
RDAP shows the date officially recorded at the registry (the TLD's authority); your provider's dashboard sometimes shows the configured auto-renewal date, which can be a few days earlier due to its own internal operational margin.
For any domain whose TLD has a known RDAP server — today the large majority, including every gTLD (.com, .dev, .app, .org...). Unregistered domains return "not found"; TLDs without RDAP return the specific unsupported-TLD notice.