WHOIS Lookup

Use this free WHOIS lookup tool to find registration details for any domain name. Enter a domain and get information about who registered it, when it expires, and how it is configured. The tool uses RDAP, the modern replacement for the old WHOIS protocol, to deliver structured and accurate data.

What is a WHOIS lookup?

A WHOIS lookup is a way to check the public registration records of a domain name. Every domain on the internet has registration information attached to it. This includes the registrar, the registration date, the expiry date, and the nameservers.

The WHOIS protocol has been around since the early days of the internet. It was created to make it easy to find out who was responsible for a particular domain or IP address. Today, WHOIS data is used by network administrators, security researchers, domain investors, and everyday website owners.

In 2025, ICANN officially transitioned from the legacy WHOIS protocol to RDAP (Registration Data Access Protocol). RDAP delivers the same information but in a structured, machine-readable format over HTTPS. This tool uses RDAP by default and falls back to WHOIS when needed.

What information does this tool show?

The lookup returns key registration data in a clean, readable format.

Domain Information
Domain name, registrar, registration date, last updated date, expiry date, domain age, and days until expiry.

Domain Status
Shows which registry locks are enabled. Transfer Lock, Update Lock, Delete Lock, and Renewal Lock help protect a domain from unauthorized changes. A tooltip explains what each lock does.

Nameservers
Lists the nameservers responsible for the domain’s DNS configuration.

DNSSEC
Shows whether DNSSEC is enabled. This is a security feature that helps protect against DNS spoofing.

RDAP Information
Confirms whether the domain supports RDAP.

Security Insights
Provides a quick summary of the domain’s security posture. It tells you if the domain is active, if it is protected against transfers, if DNSSEC is enabled, and if the expiry date is approaching.

Domain Timeline
Shows key events in the domain’s lifecycle. Registration date, last update, and expiry date are displayed in a visual timeline.

Domain Summary
A plain‑English paragraph that summarizes the domain’s registration status, protections, and configuration.

Raw RDAP Response
Developers can view the full JSON response from the RDAP server. This is collapsed by default.

Features

• RDAP‑first lookup with automatic WHOIS fallback
• Structured, human‑readable results
• Smart caching for faster repeat lookups
• Human‑readable status locks with tooltips
• Security insights that interpret the data
• Domain timeline with visual events
• Copy formatted WHOIS information to your clipboard
• Download raw RDAP JSON data
• Responsive design that works on desktop and mobile
• No login required
• Free to use

How to use this WHOIS lookup tool

Step 1
Enter a domain name in the search box. You can include or omit the “www” prefix. For example, “example.com” or “www.example.com”.

Step 2
Click the “Lookup WHOIS” button or press Enter.

Step 3
Review the results. The information is organized into sections. Domain Information shows the basic registration data. Domain Status shows which locks are enabled. Nameservers, DNSSEC, and RDAP Information provide technical details.

Step 4
Scroll down to see Security Insights, Domain Timeline, and a plain‑English Domain Summary.

Step 5
Use the Copy button to copy a formatted version of the WHOIS data to your clipboard. Use the Download button to save the raw RDAP JSON response as a file.

Step 6
If you need the raw data, click “Show Raw RDAP Response” to expand the JSON output.

Frequently asked questions

What is RDAP and why does this tool use it?
RDAP stands for Registration Data Access Protocol. It is the modern replacement for the legacy WHOIS protocol. RDAP delivers registration data over HTTPS in a structured JSON format, making it more secure and easier to parse than the old plain‑text WHOIS output. ICANN officially transitioned to RDAP in January 2025. This tool uses RDAP by default and falls back to WHOIS only when RDAP is not available.

Do I need to create an account to use this tool?
No. The tool is completely free and does not require any login or registration.

Is my search data stored or shared?
No. Lookups are performed in real time. The tool caches results temporarily for performance, but no personal data is collected or shared.

What domains are supported?
All major top‑level domains are supported, including .com, .net, .org, .io, .app, .dev, .co, .uk, .de, and many more. The tool works with both generic TLDs and country‑code TLDs.

What does “Domain Status” mean?
Domain Status shows the registry locks that are applied to a domain. Transfer Lock prevents unauthorized transfers. Update Lock prevents unauthorized changes to the domain record. Delete Lock prevents accidental deletion. Renewal Lock prevents unauthorized renewal changes. These locks help protect the domain from hijacking and other security threats.

What is DNSSEC and why does it matter?
DNSSEC (Domain Name System Security Extensions) is a security feature that helps protect against DNS spoofing and cache poisoning attacks. When DNSSEC is enabled, it adds a layer of verification to DNS responses. This makes it harder for attackers to redirect traffic from the domain.

Why does the domain age matter?
Domain age can be a signal of trustworthiness. Older domains are often considered more established and legitimate. Security researchers sometimes look at domain age to identify suspicious recently‑registered domains.

What is the difference between WHOIS and RDAP?
WHOIS is an older protocol that returns plain text over an unencrypted connection. RDAP is a modern protocol that returns structured JSON data over HTTPS. RDAP is more secure, more reliable, and easier to parse programmatically. ICANN has officially replaced WHOIS with RDAP for all generic top‑level domains.

Can I use this tool for bulk lookups?
This tool is designed for single domain lookups. For bulk queries, you may want to use the RDAP protocol directly or look into dedicated bulk lookup services.

How often is the data updated?
The data comes directly from the RDAP or WHOIS servers of the registries and registrars. It is as current as the source data. The tool caches results for 24 hours to improve performance.

What should I do if a domain shows “N/A” for some fields?
Some registries and registrars do not publish all registration details. Privacy rules, such as GDPR, may also restrict what information is publicly available. “N/A” simply means that particular piece of information was not available from the registry.

Is this tool better than other WHOIS lookup tools?
This tool uses the modern RDAP protocol, which is more secure and reliable than legacy WHOIS. It also presents the data in a structured, human‑readable format with security insights, a domain timeline, and a plain‑English summary. Most other WHOIS tools still rely on the old protocol and show raw, unformatted text.

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Disclaimer: Results from this tool are provided for informational purposes only. While we strive for accuracy, we cannot guarantee that every result is complete or error-free. Always verify important findings using additional methods before making security, technical, or business decisions.