What Is a Domain Name? Domains and Domain Names Explained
If you want to have a website online, you need a web domain. Though this may sound intimidating, it’s actually quite simple. A web domain is essentially space online where your website will operate. A domain is more than a name; it’s the foundation of your website’s identity and credibility online. In this article, we’ll explain what a web domain and domain name are, how they work, and the types of domains you can get or find online.
What is a domain name?
A domain, or web domain, is a network of computers that share an address space online. The domain name, then, is the title that identifies that address space or website.
All websites are identified through an IP address by browsers and search engines. But strings of numbers are difficult for users to keep straight. Therefore, each site also uses a domain name. According to ICANN, more than 350 million domain names are registered globally, each mapped to an IP address through the domain name system (DNS).
Think of it like this: everyone is assigned a Social Security number once they’re born. The government uses these numbers to identify each person. But for day-to-day interactions, those numbers would be far too cumbersome to use and difficult to remember. Therefore, we’re given birth names that we use to identify each other in daily life.
Website domains essentially operate the same way. While browsers use the IP address to find a site, we use a site’s domain name instead.
What is a domain?
When people refer to a domain in computing, they're typically referring to an Internet or web domain. A web domain is the human-friendly name you type into a browser to visit a website. It’s part of the system that makes navigating the Internet easier. Instead of remembering a string of numbers (an IP address), you can simply enter a name that’s easy to read, recognize, and share.
Each domain is unique and points to a specific location on the Internet, such as a website or email server. When you visit a domain, your device uses the domain name system (DNS) to find out where that domain is hosted and how to reach it. The domain doesn’t store content itself; it acts more like a digital address that tells Internet traffic where to go.
Owning a domain is akin to owning a piece of digital real estate. It’s your website’s address on the web, and it’s managed through a domain registrar. When you register a domain through a provider like Namecheap or Google Domains, that registrar updates your information in the global ICANN database within minutes. You can use it to build a website, set up professional email addresses, or direct visitors to other online content.
What is a network domain?
A network domain is a way to organize and manage a group of computers, devices, and shared resources within a private network, all under a single administrative system. It’s most commonly used in businesses, schools, and other organizations where many users and machines need to be managed together. In this type of setup, a central server - called a domain controller - handles things like login credentials, user permissions, and security policies.
One of the key benefits of a network domain is that users can sign in to any authorized computer on the network using the same username and password. It also makes it easier for IT administrators to control who has access to what, install software across multiple machines, and enforce company-wide settings. Everything is tied together under the domain, which acts like a gatekeeper for the network.
It’s important to note that a network domain is different from a domain name on the Internet. As explained previously, a domain name like WhatIsMyIP.com helps people reach websites, and a network domain helps people and computers connect securely within an internal environment.
How do domains work?
Domains work via the domain name system, or DNS. The domain name system is essentially like a phone book, or directory, for the entire Internet. It links domain names to IP addresses so that when users type in a name or web address, the browser can find the corresponding IP.
Once the browser gets the IP address, it’s able to connect to the hosting web server and display the contents of the right website for users to access.
Overview of the domain name system
When you type a domain name into your browser, like WhatIsMyIP.com, your device doesn't know where that website is located yet. Behind the scenes, the domain name system steps in to translate that human-readable address into a numerical IP address, which identifies the exact server hosting the site.
This process is known as DNS resolution. It starts when your browser queries a DNS resolver, which then checks a hierarchy of nameservers - from the root level to the domain’s authoritative nameserver - until it finds the correct IP address for the domain. Once the IP is located, your browser connects to the server, loads the website, and displays the content.
This process ensures that when someone visits your website, their device knows exactly where to go.
Nameservers are the backbone of how domain names are translated into IP addresses. They’re a critical part of the domain name system and act as guides that direct DNS queries to the right place during the resolution process.
How nameservers work
When someone enters your domain name into their browser, their computer needs to find out which server hosts your website. That journey begins with DNS resolution, and nameservers help make that journey possible.
Here’s how: the authoritative nameserver for your domain holds the official DNS records, like the A record (which maps your domain to an IP address), MX record (for email), and others.
When a DNS resolver is looking for the IP address of your domain, it eventually queries your domain’s authoritative nameserver. The nameserver then responds with the correct IP address or other requested information, allowing the user’s browser to connect to your website.
When you register a domain, you must specify at least two nameservers for it. These nameservers are what link your domain name to the correct DNS records. They can be provided by:
- Your domain registrar
- Your web hosting company
- A third-party DNS provider like Cloudflare, Google DNS, or AWS Route 53
Changing the nameservers for your domain essentially changes who manages the DNS records for it. If nameservers are misconfigured or unavailable, your domain may stop resolving altogether - something even large brands have experienced during DNS outages. This means visitors won’t be able to reach your site or send you email.
Types of domain names
There are several different types of domains or domain names. Each can provide more information about a site. The four most common types of domains are top-level domains, country-code top-level domains, generic top-level domains, and second-level domains.
Top-level (TLDs)
A top-level domain, or TLD, is the highest-ranking and most important part of a domain.
It’s the identifier at the end of a name that indicates what kind of website it is – like .com, .org, .net, or even country-specific indicators like.us or .uk.
The .com TLD comprises 54% of all top-level domains, making them the most sought-after TLD.
Country-code top-level (ccTLDs)
Country-code top-level domains, or ccTLDs, are a subset of top-level domains that are connected to a specific country. The ccTLD appears at the end of an address as an extension that identifies the country associated with the site.
For example, .us indicates websites connected to the United States and .uk associates sites with the United Kingdom. Choosing a ccTLD like .de or .fr can help businesses rank better locally in search results while signaling geographic trust.
Local government or Internet authorities regulate ccTLDs, which means that country-code top-level domain restrictions vary by country. Some countries may have different rules for who is allowed to buy or register certain web domain names. ccTLDs are also popular domains, as they can help website owners target specific geographic audiences and indicate the country and culture associated with a site.
Generic top-level (gTLDs)
Generic top-level domains, or gTLDs, refer to all top-level domains not tied to a specific country or place.
Extensions like .com, .net, and .org are all part of this category.
The ICANN (Internet Corporation for Assigned Names and Numbers) oversees the management and allocation of these web domain names online.
Many domain owners choose gTLDs because of their wide recognition as legitimate and compatible domains.
Second-level (SLDs)
Second-level domains (SLDs) refer to a different portion of a domain name. The SLD is the part of the domain name that precedes the top-level domain. For example, with “whatismyip.com,” the SLD is “whatismyip.” It provides more details about the company or entity operating the domain name or indicates what the site might contain.
What is a fully qualified domain name?
A fully qualified domain name is the full, complete name for a host on the Internet. It includes every part of the domain name needed for the domain name system to locate it. It includes the hostname, the top-level domain, and the second-level domain at minimum.
What makes it "fully qualified" is that it spells out the entire path from the specific host all the way up to the DNS root. Unlike a partial or relative domain name, an FQDN is complete. It leaves no ambiguity about which domain you're referring to.
For example, in “mail.google.com.” the “mail” subdomain specifies Google’s email server, while the rest of the FQDN ensures the request reaches the right host.
Network engineers often test FQDNs when diagnosing DNS propagation issues.
Many technical settings, especially things like SSL certificates, email server configurations, and DNS zone files, use FQDNs. They help ensure that systems on the Internet can locate and communicate with the exact resource they’re looking for.
What’s the difference between a web domain and a domain name?
The difference between the terms “domain” and “domain name” can be confusing, given that they are arguably the same thing.
Think of it as comparing a street to a street name. One is the street itself and one refers to the street. However, the terms are used interchangeably. Domains and domain names are similar. A web domain is a network of computers that operate under one address, and a domain name is that single address.
The distinction does, however, become important when configuring DNS or SSL certificates, since those systems require exact domain names, not just the conceptual “domain” you own.
Many users refer to domain name as domains. When purchasing a domain, for example, you’re purchasing the name, but you’re also purchasing the space with which you can operate your site. Essentially, a domain is a virtual space, and a domain name refers to that space.
How do I buy domain names?
To buy a domain name, you must find a reliable domain registrar accredited with ICANN. This means the web domains are legitimate and available. Once you have located a registrar, you can determine what you’d like your name to be. Choose one that’s memorable and relevant to your website’s purpose.
If you’re creating a local business or unique website, you may be able to essentially create a name and purchase it through a website builder like WordPress or Mailchimp.
These sites often provide access to various network resources with user accounts as well. However, you can also purchase quality names from sites like nametime.com or afternic.com, the latter of which also allows you to sell domains.
Once you get a domain, you need to complete the domain name registration and verify ownership through a domain name registry. Then, you will have the registered domain and title to do with as you see fit.
Depending on the registrar, the registration process can be completed in under fifteen minutes.
How much does a web domain name cost?
Prices for domain names vary. If you purchase a name through a domain registrar, you pay yearly to renew it and keep the site or webpage with a web hosting plan. If you purchase from someone else, you may be able to pay a flat rate and then pay to register elsewhere.
You can also use a free domain, which comes from sites like Wix. They allow you to use the subdomain of your choosing, but their site name comes first - like wixsite.com/samplesite.
Weigh the cost of a name with the importance of your site’s branding. Though it may seem expensive at first, a relevant Internet domain can make or break your business online. Your domain name is crucial in driving traffic to your site.
Frequently asked questions
What is a domain name vs a URL?
A URL is a complete web address that brings a user to a certain page on the web. A domain name, on the other hand, is the website's name. Entering a domain name gets you to a website; entering a URL gets you to a specific page on that website.
Can I get a domain for free?
Yes, you can get a domain for free. Many web hosting sites, like WordPress, allow users to create a custom domain name for free. However, because it's free, there are certain limits in place for what the domain name must include.
Is an email address a domain name?
An email address itself isn't a domain name. However, each email address has an email domain as part of the full address. It's the part of your address that comes right after the @ symbol.
What is a domain name example?
whatismyip.com is an example of a domain name.
