A website's IP address is the numerical location where its files live on the internet

Every website you visit has an IP address — a string of numbers like 142.251.41.14 that points to the actual computer (called a server) storing that website's files. When you type a domain name like google.com into your browser, your device asks a DNS server to translate that name into the IP address. Your browser then connects to that IP address to fetch the website.

You rarely see IP addresses because DNS does the translation automatically. But the IP address is what actually matters to your computer — the domain name is just a human-friendly label. Understanding this helps you troubleshoot connection problems, verify you are reaching the right server, and see why some websites might be blocked or slow on your network.

Key Takeaways

  • An IP address is a numerical identifier (like 142.251.41.14) that points to the physical server where a website's files are stored.
  • You can find a website's IP address using command-line tools like nslookup or ping, or through online lookup websites that do the work for you.
  • Multiple websites can share the same IP address, and one website can have multiple IP addresses depending on how the owner set up their hosting.
  • Knowing a website's IP address helps you verify you are connecting to the real site and troubleshoot why a site might be blocked or unreachable on your network.

How to find a website's IP address using your computer

The simplest method on Windows is to open Command Prompt and use the nslookup tool. Click the Start button, type "cmd" into the search box, and press Enter. A black window opens. Type nslookup google.com (replacing google.com with any website you want to check) and press Enter. Within seconds, the tool displays the IP address next to "Address:".

On Mac or Linux, open Terminal (search for it in Applications or use Spotlight) and type the same command: nslookup google.com. The output looks identical. This tool queries your DNS server and returns the IP address that server has on file for that domain.

Another option is ping, which works similarly. Type ping google.com into Command Prompt or Terminal. The ping tool sends a small test packet to the IP address and shows you the address it reached, plus how long the response took. If a website is reachable from your computer, ping will show its IP address and confirm the connection works.

Using online tools to look up an IP address

If you prefer not to use command-line tools, several websites do the lookup for you. Search for "IP lookup" or "what is my IP" and you will find sites like whatismyipaddress.com or mxtoolbox.com. These sites have a search box where you type a domain name (example.com) and they return the IP address when ready.

These tools are useful because they also show additional information: the country where the server is located, the internet service provider (ISP) that owns the IP address, and sometimes whether the address is flagged as suspicious or blocked by spam filters. This extra context can help you understand why a site might be slow or unreachable in your area.

Why one website might have multiple IP addresses

Large websites like Facebook or Netflix do not run on a single server. Instead, they spread their files across many servers in different locations around the world. When you visit facebook.com, the DNS server might direct you to a server in your region to make the connection faster. Someone else visiting from another country might get a different IP address pointing to a server closer to them.

Additionally, some websites use load balancing, a technique that splits incoming traffic across multiple servers. Each server has its own IP address, and the load balancer decides which one handles your request. This is why running nslookup twice on the same domain might show you different IP addresses — you are seeing different servers in the rotation.

Why multiple websites can share one IP address

Smaller websites often share a single server with hundreds of other sites. This is called shared hosting. The server has one IP address, but it hosts many different domains. When your browser connects to that IP address, the server looks at which domain name you requested and serves the correct website.

This is why you cannot assume that two websites with the same IP address are owned by the same person. They might be, but they could just as easily be unrelated sites renting space on the same shared hosting account. Reverse IP lookup tools (also found on sites like mxtoolbox.com) can show you all the domains hosted on a single IP address, which is useful if you are trying to understand a site's setup or verify its legitimacy.

When knowing a website's IP address helps you troubleshoot

If a website is blocked on your network, your network administrator may have blocked the IP address rather than the domain name. Knowing the IP address lets you check whether the block is intentional or a mistake. You can also use ping to test whether your computer can reach that IP address at all — if ping fails, the site is unreachable from your network, which narrows down whether the problem is DNS, the network firewall, or the website itself.

If you suspect you are being redirected to a fake website (called a phishing attack), you can look up the real IP address of the legitimate site and compare it to where your browser actually connected. Scammers sometimes register domain names that look similar to real ones, and checking the IP address reveals the deception.

The difference between IPv4 and IPv6 addresses

Most websites still use IPv4 addresses, which look like 142.251.41.14 — four numbers separated by dots, each number between 0 and 255. IPv4 has been the standard for decades, but there are only about 4 billion possible IPv4 addresses, and the internet has nearly run out.

The newer standard, IPv6, uses longer addresses like 2607:f8b0:4004:80a::200e. IPv6 allows for vastly more addresses and is slowly becoming more common. When you run nslookup on a modern website, you might see both an IPv4 and an IPv6 address listed. Your computer will use whichever one it supports, usually IPv4 if both are available.

Frequently Asked Questions

Can I visit a website by typing its IP address directly into my browser?

Yes, you can type an IP address directly into the address bar (for example, 142.251.41.14) and your browser will connect to that server. However, if the server hosts multiple websites, the server may not know which website you want and might show an error or a default page. This is why domain names exist — they tell the server which specific website to serve you.

Is it dangerous if someone knows a website's IP address?

No. IP addresses are public information — anyone can look them up. Knowing a website's IP address does not give someone access to the site's files or your data. It is like knowing the street address of a store; the address itself is not secret, but you still need permission to enter and take things.

Why does a website sometimes have a different IP address than it did last week?

Website owners sometimes move their sites to different servers or change hosting providers. When they do, they update the DNS records to point to the new IP address. This change can take a few hours to a few days to spread across all DNS servers worldwide, which is why a site might appear to have a different IP address at different times.

Can I find out who owns a website by looking up its IP address?

The IP address tells you which ISP or hosting company owns the server, but not necessarily who owns the website itself. You can use a WHOIS lookup tool to find the domain owner's information, which is often more useful than the IP address for identifying who runs a site.