What is a WHOIS lookup?

A WHOIS lookup is a query process that retrieves registration and administrative data about a specific domain name, including its registrar, creation date, expiry date, and assigned name servers.

Why is some domain contact information hidden?

Many registries and privacy services redact personal contact information to comply with data privacy regulations like GDPR and to protect domain owners from spam and malicious scraping.

What are EPP status codes in WHOIS data?

EPP status codes are standardized indicators that describe the operational state of a domain, such as whether it is locked against transfers, active, or pending deletion by the registry.

How often should I check my domain expiration date?

You should check your domain expiration date at least a few months before it is due, and ensure auto-renewal is enabled to prevent unexpected service outages caused by expired registrations.

What is the difference between WHOIS and RDAP?

WHOIS is a traditional text-based protocol for querying domain records, while RDAP is the modern, standardized replacement that returns structured JSON data over secure HTTP connections.

Can I use WHOIS lookup to find who owns a website?

WHOIS lookup reveals the registered owner, registrar, and administrative contact details of the domain name itself, though many owners use privacy protection services to mask their personal identity.

WHOIS Lookup: Find Domain Registrar, Dates and Status

The WHOIS Lookup tool queries authoritative registration data to show you who owns a domain, when it was registered, and when it expires. It acts as a transparent window into domain registry databases, letting you inspect critical administrative records in seconds.

What is it

WHOIS is a query and response protocol used for querying databases that store the registered users or assignees of an Internet resource, such as a domain name. Historically distributed via port 43, modern lookups often rely on the Registration Data Access Protocol (RDAP), which provides structured JSON responses over HTTP. When you run a query, the system contacts the specific top-level domain registry to retrieve details regarding the domain lifecycle. This includes the registrar of record, creation dates, expiration dates, administrative contacts, domain status codes, and assigned name servers. Understanding this data helps you track asset lifecycles, verify domain authenticity, and resolve technical issues.

Why it matters

Domain names are critical business assets, and letting one expire can lead to severe operational downtime and security risks such as domain hijacking. By checking WHOIS data regularly, you can monitor your expiration dates to ensure timely renewals and prevent service interruptions. Furthermore, tracking registrar details and name servers is essential when migrating hosting providers, transferring domains between registrars, or troubleshooting DNS resolution failures. Security teams also rely on this information during incident response or threat intelligence gathering to identify malicious infrastructure owners and trace phishing campaigns back to their registration sources.

How to use this tool

Navigate to the XiaTools WHOIS Lookup page.
Locate the search input box and enter your target domain name, such as example.com.
Click the Check button to initiate the query against the authoritative registry database.
Review the parsed output displayed on your screen to inspect registration dates, status codes, and name servers.

How to read the results

The WHOIS Lookup tool organizes raw registry data into a clean, easy-to-read format. Here is what each displayed field means, using example.com as a realistic reference:

Domain Name: The exact domain you queried (example.com).
Registry Domain ID: A unique alphanumeric string assigned by the top-level domain registry to identify the record (e.g., 2336798_DOMAIN_COM-VRSN).
Registrar: The accredited company where the domain was purchased and is managed (e.g., Reserved Domain Registrar, LLC).
Creation Date: The exact timestamp when the domain was first registered (e.g., 1995-08-14T04:00:00Z). This indicates the domain's age and historical footprint.
Registry Expiry Date: The date and time when the current registration period ends and the domain requires renewal (e.g., 2024-08-13T04:00:00Z).
Updated Date: The timestamp of the most recent modification made to the domain record (e.g., 2023-07-14T07:01:25Z).
Domain Status (EPP Codes): Operational states applied to the domain by the registry or registrar. For example, clientTransferProhibited means the domain is locked against unauthorized transfers, while serverUpdateProhibited prevents changes at the registry level.
Name Servers: The authoritative DNS servers assigned to handle queries for the domain (e.g., a.iana-servers.net, b.iana-servers.net). This tells you where the zone file is hosted.

Common problems and how to fix them

Privacy Protection Hiding All Contact Details

Many registries and privacy services mask registrant contact details to prevent spam and protect personal data. If you need to contact the owner for legitimate business purposes, use the designated abuse email or web form provided in the redacted output instead of expecting direct phone numbers or physical addresses.

Domain Locked Against Transfers

If you are trying to transfer your domain to a new registrar and the process fails, your domain status likely includes clientTransferProhibited. To fix this, log in to your current registrar account, unlock the domain transfer setting, and obtain your authorization code (EPP auth code) before restarting the transfer.

Outdated Name Servers

If your website is not loading after a migration, your WHOIS results might still show your old hosting provider's name servers. Log in to your domain registrar and update the name server fields with the exact values provided by your new host, ensuring proper propagation.

Best practices

Maintain accurate administrative and technical contact emails within your registrar account so you never miss critical renewal notices or security alerts. Enable auto-renewal on all production domains to prevent accidental expiration during billing failures or staff turnover. Keep domain locks enabled unless you are actively executing an approved transfer, which protects your assets from unauthorized hijacking attempts. Finally, audit your name server records periodically to ensure they match your active DNS hosting provider.

WHOIS Lookup