What Is WHOIS?
WHOIS is a widely used query and response protocol on the Internet that allows you to look up public information about domain names, IP address blocks and autonomous systems. The name WHOIS comes from the question "Who is?", as it was originally designed to identify the owners of Internet resources. When you register a domain, certain information becomes publicly available through the WHOIS system, and anyone can query this information using tools like the one offered by miip.link.
The WHOIS system works as a distributed database maintained by domain registrars accredited by ICANN (Internet Corporation for Assigned Names and Numbers). Each registrar maintains its own database of information for the domains it manages, and top-level WHOIS servers provide referrals to the appropriate registrar. When you perform a WHOIS lookup, the system searches the database of the registrar that manages the domain and returns the available information.
It's important to understand that WHOIS is not a single centralized database, but a distributed system where each registrar maintains its own portion of data. This means that results and the amount of information can vary depending on the domain's registrar and applicable privacy policies. miip.link's WHOIS lookup tool simplifies this process by automatically querying the correct registrar for each domain.
Information Shown by a WHOIS Lookup
A WHOIS lookup provides valuable information about a domain. The available data may vary depending on the registrar and privacy policies, but generally includes:
| Field | Description | Example |
|---|---|---|
| Domain name | The queried domain | miip.link |
| Registrar | Company that registered the domain | Cloudflare, Inc. |
| Creation date | When the domain was registered | 2023-01-15 |
| Expiration date | When the registration expires | 2026-01-15 |
| Updated date | Last modification of the registration | 2024-12-01 |
| Name servers | Domain's DNS servers | ns1.cloudflare.com |
| Domain status | EPP status codes | clientTransferProhibited |
| Contact data | Registrant information (if available) | Redacted for privacy |
Registrar Information
The registrar is the ICANN-accredited company that manages the domain's registration. Information such as the registrar's name, URL and IANA ID are always visible in a WHOIS lookup. Popular registrars include Cloudflare, GoDaddy, Namecheap, Google Domains and others. Knowing who the registrar is is useful if you need to contact the domain owner, renew an existing domain, or transfer a domain to another registrar.
Important Dates
The three key dates in a WHOIS record are: the creation date (when the domain was first registered), the expiration date (when the current registration expires) and the updated date (the last time any registration data was modified). These dates are especially important for determining a domain's age, verifying whether a domain is active, and calculating when an expired domain might become available for registration. Older domains tend to have more value in the domain market.
Domain Status (EPP Status Codes)
EPP (Extensible Provisioning Protocol) status codes indicate a domain's operational state. The most common are: clientTransferProhibited (the domain cannot be transferred to another registrar without authorization), clientDeleteProhibited (the domain cannot be deleted), serverTransferProhibited (the registrar has locked the transfer) and ok (the domain is active and unrestricted). These statuses are important for domain security and can indicate whether a domain is protected against unauthorized transfers.
How to Look Up WHOIS for a Domain
Looking up WHOIS information for a domain is simple with miip.link's tool. Just follow these steps:
- Enter the domain name in the text field, for example
google.com,miip.linkor any other domain you want to look up. - Click "Look Up WHOIS" and the tool will search for information on the corresponding WHOIS servers.
- Review the results which include the registrar, registration and expiration dates, name servers and any other available information.
The lookup is performed in real time, directly accessing the domain registrar's WHOIS servers. This ensures that the results are current and accurate. You can also use the WHOIS tool directly from the miip.link home page in the Network Tools section.
WHOIS Privacy and GDPR
Since the implementation of the European Union's General Data Protection Regulation (GDPR) in May 2018, the availability of personal information in WHOIS lookups has changed significantly. ICANN, the organization that oversees the domain name system, had to adapt its policies to comply with GDPR requirements regarding personal data protection.
Before GDPR, WHOIS lookups showed the registrant's personal information such as name, address, phone number and email. After GDPR, most registrars redact this personal information, showing instead messages like "Data Redacted for Privacy" or "REDACTED FOR PRIVACY". This applies to domains registered by EU citizens as well as many others, since registrars opted to apply privacy policies broadly to simplify regulatory compliance.
The data that does remain visible in most WHOIS lookups includes: the registrar's name, creation and expiration dates, name servers and the domain's EPP status codes. Registrant contact information is only accessible in specific cases such as abuse investigations, trademark disputes or other legal processes, and generally requires requesting it from the registrar through a formal process.
How to Register a Domain
If after performing a WHOIS lookup you discover that the domain you want is available, the registration process is straightforward. First, choose an ICANN-accredited registrar. There are hundreds of registrars, but the most popular include Cloudflare (which offers at-cost pricing with no markup), Namecheap (with good value for money), GoDaddy (the largest in the market) and Google Domains (now managed by Squarespace). Compare prices, as costs can vary significantly between registrars, especially for specific domain extensions.
Before registering, verify the domain's availability and consider registering common variations (like .com, .net, .org) to protect your brand. It's also recommended to enable WHOIS privacy protection, which most registrars offer for free. Finally, set up automatic renewal to avoid losing the domain due to forgetfulness. Your registration information will be available in WHOIS, but with privacy enabled, your personal data will remain hidden.
How to Interpret WHOIS Results
Interpreting WHOIS lookup results may seem complicated at first, but the key data is fairly straightforward. Here are the most important fields explained:
- Registry Domain ID: Unique identifier for the domain in the registry. Not commonly used but may be needed for legal disputes.
- Registrar WHOIS Server: The registrar's WHOIS server. If you need more details, you can query this server directly.
- Registrar URL: The registrar's website, useful for renewals, transfers or contacting support.
- DNSSEC: Indicates whether the domain has DNS Security Extensions enabled, which prevents DNS spoofing attacks.
- Domain Status: EPP status codes indicate the domain's operational state. A domain with "ok" status is active and functioning normally.
If a domain shows clientTransferProhibited in its status, it means it's protected against unauthorized transfers โ a good security sign. If you see redemptionPeriod, the domain has expired but can still be recovered by the original owner. The pendingDelete status indicates the domain is in the process of being deleted and will soon be available for new registration.