Domain Names and URLs: Understanding Website Addresses Before Launch

Before you publish your first website, you need to understand the address people will type to reach it. A domain name and a full URL are related but not the same thing, and confusing them leads to configuration mistakes that are easier to prevent than to fix after launch.

Reading a Hypothetical Web Address

Suppose you are building a small site about container gardening and you choose the address https://www.examplegarden.com/blog/planting-guide?season=spring#tips. This is a hypothetical example created for illustration; it does not point to a real site. Reading it from left to right, you can identify several distinct pieces. The portion https:// is the scheme, telling the browser which protocol to use. The portion www.examplegarden.com is the domain name, which identifies the specific server. The portion /blog/planting-guide is the path, pointing to a particular resource on that server. The portion ?season=spring is a query parameter that passes extra information to the server. The portion #tips is an anchor that directs the browser to a specific spot within the page itself.¹

Now look at just the domain name portion: www.examplegarden.com. Read from right to left, com is the top-level domain, examplegarden is the label you chose, and www is a subdomain. The domain name alone tells the browser which server to contact, but it does not specify which page or file on that server you want. That additional specificity comes from the path, parameters, and anchor that together form the complete URL.²³

Write down each piece of your own planned address on paper or in a plain text file before you configure anything. Label each part as scheme, domain, path, parameter, or anchor. This simple exercise helps you spot missing pieces or accidental typos before they become live configuration errors.

Domain Names and URLs Are Not the Same Thing

A domain name is a human-readable address that identifies a web server on the Internet. Computers communicate using IP addresses, which are numeric labels assigned to each device on a network. An IPv4 address looks like 192.0.2.172, and an IPv6 address looks like 2001:db8:8b73:0000:0000:8a2e:0370:1337. People find these strings difficult to remember and they can change over time, so domain names exist as a readable substitute.²⁴

A URL, by contrast, is the complete address of a specific resource. It includes the domain name but also adds the scheme, and optionally a path, port, parameters, and an anchor. Every valid URL points to a unique resource in theory, though in practice a URL may point to something that has moved or no longer exists. The domain name is therefore one component inside a URL, not a synonym for it.¹

Check whether you are looking at a domain or a full URL whenever you copy an address from documentation or a tutorial. If the string starts with https:// or http:// and contains a slash after the domain portion, it is a URL. If it is just a name like examplegarden.com with no scheme or path, it is a domain name. Mixing them up when configuring hosting or writing links is a common source of errors for beginners.¹

How Domain Names Are Structured

A domain name is made of labels separated by dots, read from right to left. The rightmost label is the top-level domain, or TLD. Generic TLDs such as .com, .org, and .net do not require the site to meet particular criteria. Other TLDs are more restrictive: .gov is limited to government departments, and .edu is reserved for educational and academic institutions. Country-code TLDs like .us or .fr indicate a resource associated with a particular country or territory.²³

The label immediately to the left of the TLD is often called the second-level domain. This is the part you choose when registering. Each label can contain letters A through Z, digits 0 through 9, and hyphens, though a hyphen cannot be the first or last character. A label can be anywhere from one to sixty-three characters long. You can also create subdomains under any domain you control, so a single registration can support multiple distinct addresses like blog.examplegarden.com and shop.examplegarden.com.²

Record the exact spelling of your chosen domain in at least two places, such as a project notes file and your hosting account settings. Domain names are case-insensitive, so ExampleGarden.com and examplegarden.com resolve to the same server, but a misspelled label will not. Double-checking the spelling before you finalize registration is the single most useful habit at this stage.²

URL Parts Beyond the Domain

The scheme at the beginning of a URL tells the browser which protocol to use. For websites this is almost always HTTPS or its unsecured predecessor HTTP. Browsers also recognize other schemes such as mailto for opening a mail client, but for web pages you will work with HTTPS in nearly every case.¹

After the domain comes the path, which identifies a specific resource on the server. In the early web this corresponded to a physical file location, but today it is mostly an abstraction handled by server software. Parameters follow a question mark and consist of key-value pairs separated by ampersands; they pass extra information the server can use before returning the resource. The anchor, marked by a hash symbol, points to a location within the page itself and is never sent to the server with the request.¹

Use the distinction between absolute and relative URLs when you build internal links. An absolute URL contains the full scheme and domain, while a relative URL omits parts the browser can infer from the current page context. A path starting with a forward slash is resolved from the server root; a path without a leading slash is resolved relative to the current directory. Understanding this difference prevents broken links when you move pages between directories.¹

Checking Availability and Registering

You cannot permanently own a domain name. Instead, you pay for the right to use it for a set period, and you can renew that right before it expires. This system ensures that unused names eventually become available again. Companies called registrars handle the registration process and maintain the records connecting your name to your contact information.²

To find out whether a name is available, visit a registrar's website and use their search tool, or run a whois lookup from a command line. If the whois database returns no result for the name you want, it is likely available for registration. If it returns registration details belonging to someone else, you will need to choose a different name.²

When you fill out the registration form, provide your real-world address accurately. In some jurisdictions, registrars may be required to suspend a domain if they cannot verify a valid address. Also confirm the spelling one final time before payment, because changes after registration may not be straightforward. The registrar will confirm once the domain is properly registered in their system.²

A Pre-Launch Address Checklist

Before you publish, list every address you plan to use: the main domain, any subdomains, and the full URLs of key pages. Verify that each one follows the label rules described above and that no label accidentally starts or ends with a hyphen. Confirm that your chosen TLD matches your intent; a generic TLD like .com carries no location requirement, while a country-code TLD may signal a specific regional audience.²³

Test your full URLs in a browser by typing them directly into the address bar. If a URL returns an error or a blank page, check whether the path is correct, whether the scheme is https rather than http, and whether any query parameters are formatted properly. A missing slash between the domain and path is a frequent typo that produces unexpected results.¹

Keep a short reference document with your domain name, the registrar where it is registered, and the renewal date. This makes it easier to manage the name over time and avoids losing it through an overlooked expiration. The address you choose now will be the foundation of every link, bookmark, and reference others use to find your site, so treating it carefully from the start saves effort later.²

Frequently asked questions

Is a domain name the same as a URL?

No. A domain name identifies the server, while a URL is the complete address that also includes the scheme, and optionally a path, parameters, and an anchor pointing to a specific resource on that server.¹

Can I permanently own a domain name?

No. You pay for the right to use a domain name for a set period and can renew it, but you never own it outright. This ensures unused names eventually become available to others.²

What characters are allowed in a domain name label?

Labels can contain letters A through Z, digits 0 through 9, and hyphens. A hyphen cannot appear as the first or last character, and each label can be one to sixty-three characters long.²