WHOIS & RDAP Lookup – Check Domain Ownership

Check availability or owner

WHOIS Lookup: What It Is and How It Works

A WHOIS domain lookup is a tool that allows you to retrieve key information about a domain. This includes details about the domain owner as well as administrative and technical data.

With a WHOIS search, you can check domain availability, research domain owner details, or view important registration information.

Since the traditional WHOIS system has reached certain technical limitations, it is now complemented by the modern RDAP protocol. RDAP provides domain information in a more structured, secure, and up-to-date way.

Who Owns a Domain? How to Check Domain Ownership

Here INWX offers you the possibility to test your desired address, free of charge and without registration. It's an easy way to find out whether your online presence is still available. If the domain is available, you can secure it right away. If it's already taken, you'll still receive valuable information about who owns a domain. These lookups can help with your further planning, and we're also happy to support you with the next steps.

Enter the domain you're looking for

Simply enter your desired domain name into the search field, whether it's available or already registered.

Start the WHOIS / RDAP lookup

Start the free domain lookup, and we'll retrieve the available WHOIS and RDAP data for you.

View the results

You'll then see information about the domain owner, the domain status, and the expiration date. Please note that personal data may be protected through privacy services or masking during a domain owner lookup.

RDAP vs. WHOIS: What's the Difference?

WHOIS and RDAP are protocols used to retrieve domain registration data. While they serve the same purpose, they differ significantly in their technical implementation.

WHOIS is an older, text-based protocol without a consistent data standard. RDAP was introduced to overcome these limitations and is built on modern web technologies such as HTTP(S) and JSON. As a result, an RDAP lookup returns structured responses that are easier to interpret and process.

RDAP is considered the modern successor to WHOIS because it offers standardized data formats, improved security, and better support for privacy and access control.

INWX usually displays lookup results via WHOIS, with RDAP used when WHOIS data is not available.

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What Domain Registration Details Can You See?

A WHOIS and RDAP lookup provides you with access to essential domain registration information. This includes details such as the responsible registrar, the current domain status, configured nameservers (DNS), and important dates like the registration or expiration date.

Checking domain owner information is generally possible as well. However, INWX only displays domain registration details that are publicly available and legally permitted. Personal data may be protected by privacy regulations, privacy masking, or privacy proxy services and will not be shown in those cases.

While WHOIS provides domain data as unstructured text, RDAP delivers the same information in a structured, machine-readable format.

Whois Privacy: An end to spam at last.

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THE WIDE WORLD OF DOMAINS

WHOIS & RDAP Lookup – Check Domain Ownership

WHOIS Lookup: What It Is and How It Works

Who Owns a Domain? How to Check Domain Ownership

Enter the domain you're looking for

Start the WHOIS / RDAP lookup

View the results

RDAP vs. WHOIS: What's the Difference?

What Domain Registration Details Can You See?

Harassment, spam, identity theft: With Whois Privacy, we protect you you effectively from data theft.

Have you ever been away and realised that you left important things on your home computer? No problem with DynDNS!

THE WIDE WORLD OF DOMAINS

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Oceania

Africa

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Geo TLDs

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