What Is an IP Address? Complete Guide
An IP address is an address used to identify a device or network on the internet or a local network. Think of it like a return address for internet traffic: when you visit a website, your connection needs an address so the website knows where to send the requested data.
Your internet provider assigns your connection a public IP address, which websites and online services can generally see. An IP address can reveal your provider and approximate location, but it normally does not reveal your exact home address.
What Does an IP Address Look Like?
The format depends on which version of IP you are using.
| Version | Format example | Address space |
|---|---|---|
| IPv4 | 192.168.1.10 | about 4.3 billion addresses |
| IPv6 | 2001:db8:85a3::8a2e:370:7334 | vastly larger, effectively unlimited |
The first example is a private IPv4 address commonly used inside home networks. The second shows the general format of an IPv6 address.
Public IP vs. Private IP
One of the most important things to understand is that your device can have more than one IP address.
Public IP address. Your public IP is the address your network uses to communicate with the wider internet. Websites and online services can see it when you connect. Your ISP usually assigns it, though the exact method depends on your provider and connection.
Private IP address. A private IP is used inside your local network. Your laptop might use 192.168.1.20 and your phone 192.168.1.21. Your router connects both to the internet using your public IP. This is why the address in your device settings can differ from the one shown by an online IP lookup tool.
How Does an IP Address Work?
When you open a website, your device sends a request through your network to that website’s server. Your public IP tells the internet where to send the response:
Your device → Router → ISP → Internet → Website server
The response travels back the same path, and the whole exchange happens in fractions of a second.
What Information Can an IP Address Reveal?
Depending on the database and the address, an IP lookup may show:
- Approximate geographic location
- Internet service provider
- Organization or network
- Autonomous System Number (ASN)
- IP version
- Hostname, when available
Location data is usually an estimate. Different databases can show different cities or regions for the same address, so an IP should not be treated as a precise GPS location.
Can an IP Address Reveal My Exact Address?
Usually, no. An IP can be associated with a general area, but it normally does not tell an ordinary website visitor your exact street address, apartment, or building. Your ISP may hold records linking an IP to a customer account, and that information is not available through a public lookup.
Static vs. Dynamic IP Addresses
| Type | Behavior | Typical use |
|---|---|---|
| Dynamic | Changes over time | Most residential connections |
| Static | Stays the same | Servers, businesses, remote access |
A dynamic IP might stay the same for days or weeks, or change after a reconnection. Restarting your router can sometimes produce a new address, but it is not guaranteed. A static address is intended to remain the same and is used for services that need a consistent address.
IPv4 vs. IPv6
| Feature | IPv4 | IPv6 |
|---|---|---|
| Bit length | 32-bit | 128-bit |
| Format | Four decimal numbers | Hexadecimal groups |
| Example | 203.0.113.25 | 2001:db8:1234:5678::1 |
| Address availability | Limited, mostly exhausted | Practically unlimited |
IPv6 was introduced partly because IPv4 addresses are limited. Many networks now support both. If you are not sure which your connection uses, our IPv4 vs IPv6 guide explains the differences.
Why Does My IP Address Change?
It is normal for a public IP to change, especially with dynamic addressing. Common triggers include:
- Your ISP network configuration
- Lease expiration or renewal
- Router or modem changes
- Network maintenance
- Reconnecting to the ISP
- Switching networks
If you use a VPN, websites generally see the VPN server’s IP instead of your normal public IP.
What Is an IP Lookup?
An IP lookup is a tool that takes an IP address and checks available databases for information associated with it. A typical result looks like:
IP → ISP → Network → Approximate location
The results are not always exact because the underlying databases are estimates and can become outdated. You can use our IP lookup tool to check any address.
Can Websites See My IP Address?
In most normal web connections, yes. When you connect directly to a website, its server needs information about the connection so it can send data back. Your public IP is therefore visible to the service you connect to. This does not mean the website automatically knows your name or exact physical address.
Does a VPN Hide My IP Address?
A VPN can make websites see the VPN server’s IP address instead of your normal public IP:
Without VPN: Your device → ISP → Website, so the website sees your public IP.
With VPN: Your device → VPN server → Website, so the website generally sees the VPN server’s IP.
A VPN can hide your normal IP from the sites you visit, but it does not make you completely anonymous. The VPN provider itself can still have visibility into your connection, depending on its setup and policies.
What About Tor?
Tor works differently from a traditional VPN. Instead of routing your traffic through a single VPN server, Tor routes it through multiple relays. The website you visit generally sees the IP of the final Tor relay rather than your original IP. Tor can provide stronger anonymity in some situations, but it is slower and is not necessary for ordinary internet use.
Can Someone Hack Me With My IP Address?
Simply knowing your public IP does not automatically give someone access to your computer. Your IP is a normal part of internet communication. However, exposed network services, vulnerable devices, weak security settings, or outdated software can create real security risks. For basic protection, keep your operating system and router updated, use strong passwords, and review your router’s security settings.
What Is DNS and How Is It Related to IP Addresses?
DNS, the Domain Name System, translates domain names into IP addresses. When you type a website name into your browser, your device needs the IP behind that name:
Website name → DNS lookup → IP address → Web server
If DNS is not working correctly, you may have trouble opening websites even when your connection itself works. You can use our DNS lookup tools to check A, MX, NS, TXT, and other records, test resolver performance, or check a website’s DNS configuration.
Free IP and Network Tools
You do not need special software to check your connection:
| Tool | What it shows |
|---|---|
| IP Lookup | Network, provider, and approximate location for any address |
| DNS Lookup | A, AAAA, MX, NS, TXT, and more |
| Speed Test | Download and upload performance |
Frequently Asked Questions
What is my IP address?
Your IP address is the public address associated with your current internet connection. If you check this page, you can see the address associated with your connection near the top of the site.
Does my IP address reveal my exact location?
No. An IP address can usually provide an approximate location, such as a city or general region, along with your ISP. It normally does not reveal your exact street address, apartment, or building.
Can I change my IP address?
Sometimes. If your ISP uses dynamic addressing, your public IP may change automatically. Restarting your modem or router can sometimes produce a different address, though it is not guaranteed. A VPN or Tor can also make websites see a different IP address.
Is this IP lookup tool free?
Yes. Our IP lookup tool is free to use and does not require an account or signup.
Can someone find me from my IP address?
An IP address gives approximate location and network information, but it is generally not enough for an ordinary person to determine your exact physical address. Your ISP may hold more detail, and that information is not normally available through a public lookup.
What is the difference between a public and private IP address?
A public IP identifies your connection to the internet. A private IP identifies a device inside your local network. Your laptop might use 192.168.1.20 at home while your router uses the public IP to reach websites.
Why does my IP address change?
Your public IP may change because your ISP uses dynamic addressing, or because of network changes, maintenance, lease renewal, or reconnecting to the network. With a VPN, websites may see the VPN server’s IP instead.
Can a website see my IP address?
Yes. Websites generally need to see the source IP associated with your connection so they can communicate with your device. This does not automatically tell them your name or exact physical address.
Is IPv6 better than IPv4?
IPv6 offers a much larger address space and was designed to solve IPv4’s address shortage. Both protocols remain widely used, and many modern networks support both.
Explore Our Free Tools
- IP Lookup: Check an IP address and view its network and approximate location.
- DNS Lookup: Look up A, AAAA, MX, NS, TXT, and other records.
- Speed Test: Test your download and upload speeds.
- IPv4 vs IPv6 Guide: Learn the differences between the two IP versions.
- DNS Guide: Understand how DNS works when websites do not load.