Domain Name vs URL vs IP Address: Explained
A domain name, URL, and IP address are connected concepts, but each serves a different purpose when you visit a website.
Three related terms, three different jobs
A domain name, URL, and IP address are connected, but they are not interchangeable. A domain is a human-friendly name, an IP address identifies a network interface or destination, and a URL describes how to access a particular resource.
What is a domain name?
A domain name such as example.com is a readable name managed through the Domain Name System (DNS). DNS records can map a domain to IPv4 or IPv6 addresses and can point services to other destinations. A domain can have multiple addresses, and addresses can change over time.
What is an IP address?
An Internet Protocol (IP) address is a numeric address used to route packets across IP networks. IPv4 addresses look like 192.0.2.10; IPv6 addresses look like 2001:db8::10. The ranges shown here are reserved for documentation, not real public services.
What is a URL?
A Uniform Resource Locator identifies a resource and its access method. For example:
https://example.com:443/help/article?id=7This contains the scheme (https), host (example.com), optional port (443), path (/help/article), and query (id=7). A URL can identify a specific page or API endpoint, not just a website.
Comparison table
| Item | Example | Purpose | Usually entered by a person? |
|---|---|---|---|
| Domain | example.com | Readable name resolved through DNS | Often |
| IP address | 192.0.2.10 | Network-layer destination address | Less often |
| URL | https://example.com/help | Identifies a resource and access scheme | Often |
How they work together
- You enter a URL such as
https://example.com/help. - The browser extracts the hostname,
example.com. - DNS lookup finds an appropriate address for that name.
- The browser connects to the server at the resolved address.
- The HTTP request asks for the path
/help, and the server responds.
Why not use an IP address for every website?
Domains are easier to remember and make hosting flexible. One server address can host multiple websites, and a domain can be moved to another provider by changing DNS. Direct-IP access may also fail when a server relies on the requested hostname for virtual hosting or TLS certificate selection.
Common mistakes
- Calling
example.coma full URL; it is a domain/hostname without a scheme or path. - Assuming one domain always maps to exactly one IP address.
- Confusing DNS with hosting: DNS points clients toward services, while hosting runs the site or application.
- Assuming an IP address identifies a person or exact physical location. Addresses can be shared, dynamic, proxied, or translated.
Frequently asked questions
Is a domain name the same as a URL?
No. A domain is usually one component of a URL. A URL can also include a scheme, path, query, port, and fragment.
Can a website have more than one IP address?
Yes. DNS may return multiple IPv4/IPv6 addresses for availability, load distribution, or regional routing.
Can one IP host multiple domains?
Yes. Virtual hosting allows one server or address to serve multiple domain names.
What does DNS do?
DNS translates names and provides other records that help clients locate services, such as web and mail servers.
Can I open a website by IP address?
Sometimes, but virtual hosting and TLS certificates often require the correct hostname, so using the domain is more reliable.
Which one should I share with users?
Share the full HTTPS URL to a specific page. A bare domain is useful when you want people to visit the site's home page.
Learning tip: Try the examples in a test project before using them in production. Check official documentation for behavior that depends on a tool, database, or version.