Summarise this article with:
An IP address is the numerical label that tells the internet where to deliver data to your device. Without it, websites would have no way to send the page back to you after you request it. Think of it like a postal address for your internet connection.
You can check your current public IP address right now to see exactly what information is visible.
What Is an IP Address, Exactly?
IP stands for Internet Protocol, the rules that govern how data moves across networks. Every device connected to a network gets at least one IP address. When you load a webpage, your device sends a request that includes your IP address. The server reads it, then knows where to send the response.
The address itself is just a number formatted in a human-readable way. Your router, phone, laptop, and smart TV all have IP addresses, and they come in two flavors: public and private.
What Is the Difference Between a Public and a Private IP Address?
Your public IP address is the one the internet sees. It is assigned by your Internet Service Provider (ISP) and is unique across the entire internet. Every website you visit can see this address. You share it with every device on your home network at the same time, because your router acts as the single point connecting your household to the internet.
Your private IP address stays inside your home network. Your router assigns one to each device using a protocol called DHCP. These addresses fall within specific ranges reserved by RFC 1918 for private use:
10.0.0.0to10.255.255.255172.16.0.0to172.31.255.255192.168.0.0to192.168.255.255
Private addresses never travel outside your router. When you visit a website, your router uses a process called Network Address Translation (NAT) to swap your private address for the public one before the request leaves your home.
For a deeper look at how these two types work together, see the guide to public vs. private IP addresses.
What Is the Difference Between IPv4 and IPv6?
IPv4
IPv4 is the older and still most common version. Addresses look like 192.168.1.1: four numbers between 0 and 255 separated by dots. Because it uses 32-bit addresses, IPv4 can only support about 4.3 billion unique addresses total. The global pool managed by IANA ran out in February 2011, and regional registries in North America followed in 2015.
IPv6
IPv6 was built to solve that shortage. Addresses use 128 bits and look like 2001:0db8:85a3:0000:0000:8a2e:0370:7334: eight groups of four hexadecimal characters. The total address space is 2^128, or roughly 340 undecillion unique addresses. That number is large enough to give every grain of sand on Earth hundreds of IPv6 addresses to spare.
Most modern devices and ISPs support both versions simultaneously, a setup called dual-stack. You may have both an IPv4 and an IPv6 public address right now.
What Does Your IP Address Reveal About You?
This is the question most people actually want answered. Here is an honest breakdown:
What it can reveal:
- Your approximate location. IP geolocation databases can reliably identify your country around 95-99% of the time. At the city level, accuracy drops considerably, often ranging from 20% to 75% depending on the database and how your ISP routes traffic. See how accurate IP geolocation actually is for the full picture.
- Your ISP's name. The company that provides your internet connection is publicly linked to your IP address block.
- Connection type. Databases can often infer whether an IP belongs to a residential, business, or mobile connection.
- Time zone estimate. Derived from the approximate geographic location.
What it cannot reveal:
- Your exact street address or apartment number
- Your name or any personal account details
- Your browsing history
- Your passwords
In my testing across several geolocation tools, the city-level result is often close but can be off by one town or more, especially in rural areas or when ISPs route traffic through a distant hub city. Only your ISP knows exactly which customer was using a given IP at a given time, and they do not share that without a legal request.
For a detailed breakdown of the risks, read what someone can do with your IP address.
Does Your IP Address Change?
Most residential connections use dynamic IP addresses, which change periodically. Your ISP assigns them temporarily using DHCP. They can change when you reboot your router, after a set lease period (often 24 hours or a multiple of it), or after routine ISP maintenance. Dynamic addressing lets ISPs reuse a limited pool of IPv4 addresses across many customers.
Static IP addresses stay the same indefinitely. They are more common for businesses, servers, and anyone who needs a consistent address for remote access or hosting. ISPs usually charge extra for static IPs on residential plans.
How Can You Protect Your IP Address?
If you want to limit what your IP address reveals, the main options are:
Use a VPN. A Virtual Private Network routes your traffic through a server in another location, so websites see the VPN server's IP instead of yours. Check our guide on how to hide your IP address and verify your setup with the IP lookup tool.
Use Tor. The Tor browser bounces your connection through multiple volunteer-operated servers before reaching its destination. This is slower than a VPN but provides stronger anonymity.
Use a proxy server. Proxies act as intermediaries, but most do not encrypt your traffic, making them less secure than VPNs for privacy.
Common Questions
How do I find my IP address?
The fastest way is to use a tool like What Is My IP, which shows your public IPv4 and IPv6 address instantly. For your private (local) address: on Windows, open Command Prompt and type ipconfig; on macOS or Linux, open Terminal and type ifconfig or ip addr; on iPhone, go to Settings, tap Wi-Fi, then tap the network name; on Android, go to Settings, tap Network, then tap your Wi-Fi connection for details.
Why does my IP address show the wrong city?
IP geolocation maps your address to a database that links IP blocks to locations. If your ISP routes traffic through a hub in a different city, or if the database entry is stale, the result can be off by tens of miles or more. Country-level accuracy is very high, but city-level is far from perfect. This is a known limitation of IP-based location, not a sign that something is wrong with your connection.
Can someone track my location using my IP address?
Not precisely. An IP address can reveal a general area (sometimes the right city, sometimes a nearby hub city), but it cannot pinpoint your home address. Your ISP links the IP to a specific customer account, but that information is not publicly accessible. Law enforcement can obtain it through legal channels. For ordinary websites or individuals, your IP reveals an approximate region and your ISP name, nothing more.
Is it safe to share my IP address?
Sharing it publicly carries some risk. A malicious actor could use your IP to attempt attacks against your router, flood your connection with traffic (a DDoS attack), or try to identify your general location. The risks are real but not catastrophic for most users. Avoid sharing your IP in public forums or with untrusted parties, and keep your router firmware updated.
What is a static IP address and do I need one?
A static IP address is one that never changes. Most home users do not need one. A static IP is useful if you are hosting a server at home, using remote desktop access reliably over time, or running services that other people connect to by address. ISPs typically charge an extra monthly fee for static residential IPs.
Sources
WhatIsMyLocation Team
Our team of network engineers and web developers builds and maintains 25+ free networking and location tools used by thousands of users every month. Every article is reviewed for technical accuracy using real-world testing with our own tools.
Related Articles
Try Our Location Tools
Find your IP address, GPS coordinates, and more with our free tools.