Utinzo

WHOIS Lookup

Look up domain registration information — registrar, dates, nameservers, and status via the RDAP protocol.

Did this tool work for you?

How to use this calculator

  1. 1

    Enter the domain name you want to look up.

  2. 2

    Click "Check Now" to query the RDAP registry.

  3. 3

    Results show the registrar, registration date, expiry date, and nameservers.

  4. 4

    Note: registrant personal details may be hidden by WHOIS privacy protection.

Frequently asked questions

Is this a real WHOIS query?

It uses RDAP, the successor to WHOIS, rather than the older port-43 text protocol. The page requests https://rdap.org/domain/<name>, a service that points to the registry responsible for the domain, and reads the JSON that comes back. The data shown is whatever that registry publishes, and the old WHOIS layout and fields you may have seen elsewhere are not reproduced.

Which fields does it show?

Seven: Domain, Registrar, Registered, Updated, Expires, Status and Nameservers. Dates are written as, for example, Tue Nov 14 2023, with the time of day dropped. Nothing about the registrant, administrative or technical contacts is displayed, even when the registry returns it, and neither are the registrar’s abuse contact or DNSSEC status.

Why can I not see who owns the domain?

Two reasons. Many registries and registrars now redact personal contact data, and in any case this page shows no contact fields at all. The Registrar row identifies the company that sold the domain, not the owner. If you need to reach the holder, the registrar is the place to start.

What do the Status values mean?

They are the registry’s status codes for the domain, shown joined by commas. Values such as "client transfer prohibited" mean the registrar has locked the domain against transfer, which is normal and good practice. "pending delete" and "redemption period" indicate a domain that has lapsed and is on its way to being released. The tool prints them as given and does not explain them.

The lookup returned an error or dashes. What does that mean?

An error such as "RDAP lookup failed (404)" means the service answered with an HTTP error, often because no record was found. That can mean the domain is unregistered, but it can equally mean the name was misspelled, is a subdomain, or sits under a top-level domain that does not offer RDAP, so it is not proof that a name is available. A dash in a field just means the registry did not supply it. The request stops after 9 seconds.

Should I enter a subdomain?

No. Registration records exist for the registrable domain, such as example.com, not for www.example.com or blog.example.com. The tool strips URLs down to the host name but does not reduce a subdomain to its parent, so type the main domain yourself. Multi-part endings like .co.uk count as part of the domain, so example.co.uk is correct.

How accurate is the expiry date?

It is the expiry the registry holds, which is what matters for the domain’s life, but it can change when the owner renews, so it is a snapshot. Many registrars give a grace period after expiry, and the length varies, so a passed date does not always mean the domain has been released.

Is the answer cached?

The page’s own response carries a 60-second cache header, and registries update on their own schedules. A renewal or transfer made moments ago may take a little while to show.

About whois lookup

Domain registration details through RDAP

What the lookup reads

RDAP, the Registration Data Access Protocol, replaced WHOIS as the standard way to ask a registry about a domain, and answers in structured JSON (the format is defined in RFC 9083). This tool queries it through rdap.org, which redirects the request to the right registry, and then extracts seven fields. Anything the registry returns beyond those, including contacts, is ignored.

Fields shown by the tool
FieldSource in the responseNotes
DomainDomain nameLowercased
RegistrarEntity with the registrar roleFalls back to a handle, or a dash
RegisteredRegistration eventDate only
UpdatedLast-changed eventDate only
ExpiresExpiration eventDate only
StatusStatus listJoined with commas
NameserversNameserver listComma separated

Example inputs and what to read

Enter a registrable domain like example.com. Start with Expires: a date that is close, or Status values showing the domain has lapsed, is the first thing to act on for your own domain. Registered tells you how long the name has existed; a recent date on a site claiming a long history is worth noting. Registrar identifies where to log in or whom to contact. Nameservers should match your DNS provider. These are descriptions of how to read a result, since the content comes from the live registry rather than from samples stored on this page.

Registrar and registry

The registry runs a top-level domain and keeps the authoritative database; the registrar is the accredited retailer you buy the name from. The Registrar row shows the second, while the dates and statuses come from the registry’s record.

Why ownership is usually not shown

Registrant details are redacted by many registries and registrars, and this tool does not display contact fields at all. What remains is useful for operations: the registrar, the lifetime of the registration, lock-style statuses and the delegated nameservers. If you need to contact a holder, go through the registrar, and for a name you want to buy, check whether the Status indicates a lapse before approaching anyone.

Limits to keep in mind

The lookup works on registrable domains only, and an error does not prove a domain is free. Dates lose their time of day, and the tool does not display DNSSEC state, contact data, renewal prices or history. If you only need how old a domain is, the Domain Age Checker is aimed at that question. Results are cached briefly, so very recent changes can lag.

WHOIS Lookup – Utinzo

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Results are estimates for informational purposes only and do not constitute professional financial, medical, legal, or technical advice. Read full disclaimer →