Guide Glossary

What Is a Domain? Its Role as an Address on the Internet and How to Get One

Published: 2024.12.05 Updated: 2026.03.13
A network spreading across the world

The address of your website on the internet is called a domain.

In this article, I explain the basics of domains, how to get one, the points to watch, and the costs involved in a way that is easy for beginners to understand.

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What Is a Domain? An Address on the Internet

A domain is like an address on the internet.

For example, in www.example.com, the example.com part is the domain name.

This domain name allows people to find your website from a browser. A domain name is a human-friendly name used instead of a complex IP address, such as 192.0.2.1.

Types of Domains

There are several types of domains. They are mainly divided into the following two categories:

Top-Level Domains (TLDs)

This is the last part of a domain name, such as “.com,” “.net,” “.org,” or country-code domains like “.jp” for Japan and “.uk” for the United Kingdom.

Second-Level Domains (SLDs)

This is the part that appears immediately before the TLD and refers to the name of the website. For example, in https://www.example.com, the example part corresponds to this.

A Unique Domain Is Called a Custom Domain

A custom domain refers to a unique domain name owned by a specific organization or individual and used for a website or email address on the internet.

For example, Server Field’s domain, “serverfield.org,” is a custom domain that only Server Field can use.

How to Get a Domain

To use a domain, you need to register a domain name. This is done through a domain name registrar. The process is as follows.

1. Choose a Domain Name

Think of a unique and memorable name that fits your website.

2. Check Availability

Search the registrar’s website to check whether the domain name you chose has already been taken by someone else.

3. Register the Domain

If it is available, register that domain name and obtain ownership rights. This is when a fee is charged.

The Easiest Way Is to Get a Domain When Signing Up for Hosting

When you sign up for a rental server, some hosting companies may provide a domain free of charge during the server contract period.

Because this can eliminate the various settings and fees involved in getting a domain, it is easier and more cost-effective.

Points to Watch When Using a Domain

Domain Name Expiration Date

You do not buy a domain name outright. Instead, you rent the right to use it for a fixed period, usually one year. If you do not renew it before it expires, someone else may be able to register that domain name.

Privacy Protection

When you register a domain, your personal information is made public in the WHOIS database. To protect privacy, many registrars offer a service that hides personal information for an additional fee.

Costs Involved in a Domain

Registration Fee

Registering a domain name costs money. This cost varies depending on the type of domain, or TLD, and can range from a few hundred yen to several thousand yen per year.

Renewal Fee

To keep a domain name, you need to pay a renewal fee each time it expires. This can be the same as the registration fee or even more.

Additional Services

Additional services such as privacy protection may require separate fees.

Summary

Use a domain and put your homepage online.