The IPv4 address shown above is your device's public IPv4 address, the number the internet uses to route traffic back to you, along with its approximate geolocation and ISP.

What is an IPv4 address?

An IPv4 address is a unique numeric label assigned to every device that communicates over the Internet Protocol version 4, the fourth and still most widely used version of the internet's addressing system. When people ask "what is my IPv4 address", they usually mean the public number their internet connection presents to the rest of the world. It works like a return address on an envelope: without it, servers would have no way to send requested web pages, emails, or video streams back to my IP address.

IPv4 uses a 32-bit number, which is written in the familiar dotted-decimal format: four groups of digits separated by periods, such as 203.0.113.42. Each of the four groups (called an octet) can range from 0 to 255. Because the address is only 32 bits wide, the entire system can represent about 4.3 billion unique addresses, a number that once seemed limitless but is now nearly used up.

Public vs. private IPv4 addresses

Not every IPv4 address is visible on the open internet. The standards reserve several ranges as private addresses that are used only inside home and office networks:

• 192.168.0.0 – 192.168.255.255 — the most common home-router range.
• 10.0.0.0 – 10.255.255.255 — often used by larger networks and businesses.
• 172.16.0.0 – 172.31.255.255 — a middle range popular in enterprise setups.

These private addresses are reused by millions of networks worldwide and are never routable across the internet. The address our tool displays is your single public IPv4 address, which is unique and assigned by your internet service provider (ISP).

How NAT lets many devices share one IPv4

You may have a dozen devices at home yet only one public IPv4 address. This is possible thanks to Network Address Translation (NAT). Your router gives each phone, laptop, and smart device its own private address, then translates their traffic so it all appears to come from a single public address. Return traffic is sorted back to the correct device automatically. NAT is a clever workaround that has dramatically extended the life of the limited IPv4 pool.

IPv4 exhaustion and why IPv6 exists

Because there are only about 4.3 billion IPv4 addresses and far more connected devices than that, the world officially ran out of freely available blocks. This IPv4 address exhaustion is why the newer IPv6 standard was created, offering a vastly larger pool of roughly 340 undecillion addresses. Most connections still rely on IPv4 today, but IPv6 adoption is growing steadily. You can check your own next-generation address with our What Is My IPv6? tool.

Static vs. dynamic IPv4 addresses

ISPs assign public addresses in two ways:

• Dynamic IPv4 — the address can change periodically, whenever your router reconnects or your ISP renews the lease. Most residential connections are dynamic.
• Static IPv4 — the address stays the same over time. These are useful for hosting servers, remote access, or running mail services, and are usually offered as a paid add-on.

How to find and change your IPv4 address

The quickest way to see your public address is simply to load this page, our tool reads it directly from your connection. To change it, you have a few options:

• Restart your router — with a dynamic address, disconnecting for several minutes often prompts your ISP to hand out a new one.
• Use a VPN — routing your traffic through a VPN server replaces the public address others see with the server's address, which also masks your true location.
• Contact your ISP — for a permanent static address or a specific change, your provider can adjust your assignment.

For a full breakdown of any address, including one you look up manually, visit our IP address lookup tool.

What your IPv4 address reveals

Your public IPv4 address does not expose your name or exact street address, but it does reveal a surprising amount. Websites and services can infer your approximate city or region, your ISP, and roughly the time zone you are in. It can also be used to estimate your general location for content and advertising. This is why privacy-conscious users often route traffic through a VPN to keep their real address private.

Frequently asked questions

What is my IPv4 address?

Your IPv4 address is the unique dotted-decimal number your ISP assigns to your connection, shown at the top of this page. It is how the internet routes data back to you, and IPAddress-Lookup.com displays it instantly along with its geolocation and ISP.

Is my IPv4 address the same as my private IP?

No. The public IPv4 address shown here is what the internet sees. Your private IP (such as 192.168.1.5) is assigned by your router and is only visible inside your own home or office network.

Why does my IPv4 address keep changing?

Most home connections use a dynamic IPv4 address, so your ISP may reassign it when your router reconnects or a lease expires. If you need a fixed address, ask your provider about a static IPv4 option.

Can someone find my exact location from my IPv4 address?

Not precisely. An IPv4 address typically reveals only your approximate city or region, ISP, and time zone. It does not expose your name or street address unless combined with information only your ISP holds.

How do I hide or change my IPv4 address?

You can restart your router to request a new dynamic address, or use a VPN to route traffic through a different public address and mask your location. For a permanent change, contact your ISP about a static IPv4 assignment.