Yohan Cayden

March 03, 2023

Importance of Whois in Search Engine Optimization (SEO)

In the world of Search Engine Optimization (SEO), there are a lot of technical terms and concepts to learn. One of these terms is "Whois," which refers to a database that contains registration information about a domain name. In this blog post, we'll explore what Whois is, why it's important for SEO, and how to use it effectively.

What is Whois?

When you register a domain name, you provide certain information about yourself or your organization, such as your name, address, and contact information. This information is stored in a database called Whois. Anyone can access this database and retrieve information about a domain name by using a Whois lookup tool.

Whois is maintained by the Internet Corporation for Assigned Names and Numbers (ICANN), which is responsible for managing the Domain Name System (DNS) and the allocation of IP addresses. ICANN requires domain name registrars to collect and maintain accurate and up-to-date information about domain name owners in the Whois database.

Why is Whois important for SEO?

Whois information is important for SEO because it can provide valuable insights into the ownership and history of a domain name. By analyzing Whois data, SEO professionals can:

  1. Identify potential website owners and partners: Whois information can help you find the contact information of website owners, which can be useful if you want to reach out to them for link building or collaboration opportunities.

  2. Verify website ownership: Whois information can help you verify that a website is owned by the person or organization claiming to own it. This can be useful if you're dealing with a website that has been hacked or is engaging in suspicious activities.

  3. Check domain age: Whois information can also give you an idea of how long a domain name has been registered. Generally, older domains are considered more trustworthy by search engines, so this information can help you evaluate the authority of a website.

  4. Investigate domain history: Whois information can also provide information about the previous owners of a domain name. This can be useful if you're considering buying a domain name or if you're investigating a website that has changed hands multiple times.

How to use Whois effectively for SEO?

To use Whois effectively for SEO, you'll need to know how to perform a Whois lookup. There are many free Whois lookup tools available online like ExcelWhois.

To perform a Whois lookup, simply enter a list of domain names you want to investigate into a spreadsheet and saved it as CSV format, then upload the CSV file. The tool will retrieve the domain's registration information and display it on the screen.

When analyzing Whois data, it's important to look for the following information:

  1. Registrant name: This is the name of the person or organization that registered the domain name. You can use this information to identify potential partners or investigate the history of the domain.

  2. Registrant email: This is the email address of the person or organization that registered the domain name. You can use this information to contact the owner of the website if you're interested in a partnership or collaboration.

  3. Domain age: This is the date when the domain name was first registered. You can use this information to evaluate the authority of the website.

  4. Nameservers: These are the servers that are responsible for hosting the website's DNS records. You can use this information to investigate the hosting provider and check for any technical issues that might be affecting the website's performance.


Whois is an important tool for SEO professionals who want to investigate the ownership and history of a domain name. By using Whois lookup tools effectively, you can gather valuable information about potential partners, verify website ownership, evaluate domain authority, and investigate domain history.

TAGS: General

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