IP Checker: what is my IP address, and what type is it?
See your public IP address and what your browser shares, and check if any IP address is public or private.
- Free to use
- Runs in your browser
- No sign-up
Your public IP address
Checking…
What your browser tells every website
Read from your browser on this page; none of it is sent to us by this tool.
About the IP Checker
See the public IP address websites see when you visit them, whether it is IPv4 or IPv6, and what your browser tells every site: its user agent, languages, time zone and screen size. Then type any IPv4 or IPv6 address, such as one your router, server log or analytics shows, to see whether it is valid, its full and short forms, and whether it is a public address or one of the special ranges: private networks, carrier-grade NAT, link-local, loopback or documentation. Your address comes from one request to our server, which saves nothing; the rest runs in your browser.
How it works
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Step 1
Open the page: your public IP address appears at the top, with what your browser shares beside it.
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Step 2
To check another address, type it in the box, or press one of the examples, such as a home router address or an IPv6 address.
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Step 3
Read its type and range, and copy the address you need, for example for an allowlist or an analytics filter.
Public and private addresses
The devices in a home or office usually have private addresses, such as 192.168.1.10, from the ranges RFC 1918 sets aside for private networks: 10.0.0.0/8, 172.16.0.0/12 and 192.168.0.0/16. The internet sees one public address for the whole connection, the one at the top of this page. Some providers go one step further and share a public address between many customers through carrier-grade NAT, using the 100.64.0.0/10 range from RFC 6598 inside their network. The tool names each range from IANA's IPv4 and IPv6 special-purpose address registries.
IPv4 and IPv6
An IPv4 address is 32 bits, written as four numbers from 0 to 255 separated by dots. An IPv6 address is 128 bits, written as eight groups of hexadecimal digits separated by colons, where :: stands for one run of zero groups (RFC 4291). RFC 5952 recommends one short form, in lower case with leading zeros left out; the tool shows that form and the full one. For most IPv6 addresses the first 64 bits are the network and the last 64 identify the device (RFC 4291), so the tool also shows the /64 network an address belongs to. Public IPv6 addresses come from the global unicast range, 2000::/3.
What this tool cannot do
It shows the one address your browser used to reach our server: a connection with both IPv4 and IPv6 may have another, and a VPN, proxy or company network shows its own address instead of yours. It does not look up where an address is or which provider it belongs to, and it does not test for DNS or WebRTC leaks. Our server reads your address for this one answer and the tool does not save it, though, like any website, our web server keeps its own access logs.
Frequently asked questions
What is my IP address?
It is the public address the internet sees for your connection, shown at the top of this page. Every website you open sees this address, because your router or your mobile provider sends all your devices' traffic from it. The address of your phone or computer on your own Wi-Fi is usually a private one, such as 192.168.x.x, which only your network sees.
Why do my phone and my Wi-Fi show different IP addresses?
Each network has its own public address. On Wi-Fi you use your broadband connection's address; on mobile data you use your mobile provider's, which may be shared with other customers through carrier-grade NAT. Many connections also get a new address from time to time, so do not rely on yours staying the same unless your provider gives you a fixed (static) IP address.
My router shows an IP address starting with 100. Why?
Addresses from 100.64.0.0 to 100.127.255.255 belong to the shared address space RFC 6598 sets aside for carrier-grade NAT. If your router's internet (WAN) address is in this range, your provider shares one public address between you and other customers: the address at the top of this page belongs to the provider's equipment, and opening a port on your router will not let anyone reach you from the internet.
Is my IP address private or public?
Type it in the box. Addresses in 10.0.0.0/8, 172.16.0.0/12 and 192.168.0.0/16 are private (RFC 1918), and fc00::/7 is the IPv6 version (RFC 4193). Addresses starting 169.254 or fe80 are link-local, which a device uses only on its own network link. Most addresses outside the special ranges are public.
Why would I need my IP address?
To add it to an allowlist, such as a hosting control panel, a firewall or an admin login that only opens from known addresses, or to leave your own visits out of reports: Google Analytics 4 can mark traffic from IP addresses you list as internal. A support team may also ask for it. Your IP address can change, so check it again before you add it somewhere.
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