Whois Domain Lookup

Enter at least one character

Whois lookup

Learn more about the name behind the domain

What's available

A Whois domain lookup is a good way of finding out information about a domain that's already registered, including its registration and expiration dates. You can use our Whois domain lookup tool to find out who owns a domain with the following extensions: .com, .net and .shop.

For other TLDs however, you should go through the registry responsible for that particular domain. For example, queries about .org domains should be directed to the Public Interest Registry, while Whois domain searches for .info should be done via Afilias Limited. By going straight to the registrar, you will receive technical data such as the nameserver being used, which means you can determine which provider the domain is registered with.

If you would like to request data about a domain directly from a special registry, select the respective partner on our registrar page.

Graphical display: Domain transfer logo from IONOS; Person sitting in a chair using a tablet

Contacting the domain owner

In the US, Whois domain information often includes the personal contact details of the domain owner. In this case, as it’s easy to find out who owns a domain, you can simply contact the owner directly with any queries, such as questions about the availability of the domain.

There are however some notable exceptions. For instance, the EU’s General Data Protection Regulation (GDPR), which came into effect in May 2018, means that the personal data of domain owners based in the EU can no longer be published. As a result, if the domain you’re searching for is owned by an individual or organization in the EU, their contact details may not be visible. In addition, US-based domain owners can also use a proxy or a domain privacy service to hide their personal contact details.

In such cases, contact must be established via the registrar, who can forward your request to the domain owner. You may wish to do this to inquire about technical issues or to report the possible misuse of a domain name.

Graphic illustrating how you can stand out from the crowd

How does the Whois domain lookup work?

Icon: Security validation; Document with blue security shield and ticks

Whois database

Whois domain searches are facilitated through a Whois database — a central location where publicly accessible information on registered domains is stored. Note: Whois databases no longer provide data for EU-owned domains due to the GDPR.The registrars that administer the various domain extensions each maintain their own Whois databases. For example, the previously mentioned Public Interest Registry administers a Whois database for .org domains.

Icon: Binoculars

Whois search details

You can use two versions of the Whois domain lookup: The tool on this page provides you with the domain name, registration date and expiration date for a variety of domain extensions. Meanwhile, more detailed information can be found on our registrar page.Note that contacting the registry directly may be best in some cases — such as the Public Interest Registry for .org domains.

Icon with a security shield and padlock


Which data is made public via the Whois service depends on either the respective registry or ICANN (Internet Corporation of Assigned Names and Numbers). The registries determine which data is collected.For instance, as the registry for the .info TLD, Afilias Limited determines what information is listed in the Whois database for those domains.

Enter at least on character
Your personal consultant

At IONOS, you have a dedicated contact person for personalized advice, tips to boost your online success, and technical support. Reach them via phone, chat and email, all at no cost to you as an IONOS customer.

Whois domain lookup

FAQ – Frequently asked questions

The WHOIS lookup can confirm if a domain has been registered or not. It may also provide information on the registrar and registry, as well as the domain status, the creation, expiration and update dates; and name servers for any given domain.

The domain checker helps to identify whether or not a particular domain name is available to register. The Whois lookup gives you access to further limited information regarding a registered domain. Should your requested domain name still be available, you can use both the Whois service, as well as the domain checker in order to easily register your desired domain name with IONOS. Furthermore, we recommend suitable domain alternatives in case a particular domain name is registered already. Regardless of whether you use our Whois lookup or a domain checker, our main goal is to offer you the best support possible on your way to your own domain name.

Due to the GDPR we will no longer publish your personal data on the WHOIS database. All personal information is hidden and cannot be accessed and we assure you that your data is safe with us.

Yes, there is .com domain Whois support. Just like with other domain extensions, you can look up who owns a .com domain with WHOIS or whether certain .com domains are available. However, it should be noted that the information available during this .com domain lookup will depend on where the domain is registered. The Whois database is not an independent venture, but deals with multiple registrars that all contribute information.

These registrars manage different domain extension categories. Domain extensions are broken down into several categories: generic top-level domains (gTLD), new top-level domains (nTLD) and country code top-level domains (ccTLD). The domain extension .com (which stands for commercial) is a gTLD domain and is the most common gTLD, others include .org and .net. gTLDs are international domains and the information on these domains is handled by the Internet Corporation for Assigned Names and Numbers (ICANN "new top-level domains"). However, due to GDPR only a limited amount of information is made available in the .com domain Whois lookup search results.

Learn more about a Whois Domain Lookup

Contact us