Why you might need a website's IP address
A website's IP address is the numerical identifier that points your browser to the actual server holding the website's files. Most of the time you do not need it — you type a domain name like example.com and your computer handles the translation automatically. But there are situations where knowing the IP address matters: you are troubleshooting a connection problem, you want to see if two websites run on the same server, or you are setting up DNS records for your own domain and need to verify what is actually pointing where.
Finding an IP address takes less than a minute and requires no special software or technical knowledge. You have several straightforward methods depending on what device you are using and how much detail you want to see.
Key Takeaways
- The simplest method on any device is to use an online IP lookup tool — type the domain name and it shows the IP address when ready.
- On Windows, you can open Command Prompt and type nslookup example.com (replacing example.com with the actual domain) to see the IP address.
- On Mac or Linux, open Terminal and type dig example.com or nslookup example.com to get the same result.
- A website may have multiple IP addresses if it uses a content delivery network or load balancing, so seeing several results is normal.
- The IP address alone does not tell you who owns the server — you need a WHOIS lookup to find that information.
Using an online IP lookup tool
The fastest method works on any device with a web browser. Open a search engine and search for "IP lookup" or "what is my IP" — you will find several free tools at the top of the results. Common ones include MXToolbox, WhatIsMyIPAddress.com, and DNSChecker. Click on any of them.
Type the domain name you want to check into the search box. Use only the domain — for example, type google.com, not https://www.google.com. Click the lookup button. Within seconds, the tool displays the IP address (or addresses) associated with that domain. Some tools also show additional information like the server location, the hosting provider, and whether the domain is currently active.
This method requires nothing to be installed and works the same way on Windows, Mac, iPhone, or Android. If you need to check multiple domains, you can do them one after another without closing the page.
Finding the IP address on Windows using Command Prompt
If you prefer to use your own computer rather than a web tool, Windows includes a built-in command called nslookup that does the same job. Open the Start menu, type cmd, and press Enter. This opens Command Prompt, a black window where you can type text commands.
Type nslookup example.com (replacing example.com with the actual domain you want to check) and press Enter. Command Prompt displays the results in a few lines. Look for the line that says "Address:" — the number next to it is the IP address. If there are multiple addresses listed, the domain uses more than one server.
You can close Command Prompt by typing exit and pressing Enter, or straightforward clicking the X button. The nslookup command works the same way whether you are checking a major website or a small business domain.
Finding the IP address on Mac or Linux using Terminal
Mac and Linux systems include similar built-in tools. On Mac, open Spotlight by pressing Command + Space, type terminal, and press Enter. On Linux, open the process menu and search for Terminal. Both open a command window similar to Windows Command Prompt.
Type dig example.com (replacing example.com with your domain) and press Enter. The output is longer than nslookup, but the information you need is in the section labeled "ANSWER SECTION." Look for the line with the domain name followed by "A" and then a number — that number is the IP address. Alternatively, you can type nslookup example.com just as you would on Windows, and the output is simpler to read.
Close Terminal by typing exit and pressing Enter, or by closing the window. Both dig and nslookup are equally reliable — use whichever one you find easier to read.
Understanding what the results mean
When you look up a domain, you may see one IP address or several. A single address is straightforward — that is where the website lives. Multiple addresses usually mean the website uses a content delivery network (a system that copies the site to servers around the world for faster loading) or load balancing (spreading traffic across multiple servers). Both are normal for popular websites.
The IP address itself is just a number. It does not tell you who owns the server, where the server is physically located, or what other websites might be on the same server. If you need that information, you can use a WHOIS lookup tool — search for "WHOIS lookup" and enter the IP address (not the domain name) to see registration details. Keep in mind that WHOIS results can be hidden behind privacy services, so you may not always see the actual owner.
When an IP lookup shows an error or no results
If a lookup tool says it cannot find the domain, check that you typed the domain name correctly. Common mistakes include including "www." at the start or "http://" at the beginning — neither belongs in an IP lookup. Type only the domain itself: example.com, not www.example.com.
If the domain is spelled correctly but still shows no results, the domain may not exist, may have expired, or may not be set up yet. Try visiting the website in your browser to confirm it actually works. If the website loads in your browser but the IP lookup fails, the lookup tool itself may be temporarily unavailable — try a different tool or wait a few minutes and try again.
Frequently Asked Questions
Can I find out who owns a website just from its IP address?
Not directly from the IP address alone. You need a WHOIS lookup tool, which searches a database of IP address registrations. Enter the IP address into a WHOIS tool and it shows the registered owner, though many owners use privacy services to hide their information. The domain registrar (the company where the domain was purchased) may also have public WHOIS records.
Why does the same website show different IP addresses when I look it up multiple times?
Websites using content delivery networks or load balancing intentionally return different addresses depending on where you are or which server is least busy. This is normal and improves website speed. If you always get completely different results, the domain may be misconfigured, but a few variations are expected.
Is it illegal to look up a website's IP address?
No. IP addresses are public information — they have to be, or the internet could not work. Looking up an IP address is no different from looking up a business address in a phone book. What you do with that information matters legally, but the lookup itself is completely fine.
What is the difference between an IP address and a domain name?
A domain name is the human-readable address you type into your browser (example.com). An IP address is the numerical address that computers actually use (192.0.2.1). Your computer automatically translates the domain name into the IP address behind the scenes, which is why you do not have to remember numbers.