The address is looked up with the free public ipify API (api.ipify.org). Lasstegnas does not store it. Everything in the table below is read locally by your browser.
What your browser tells websites
User agent
Languages
Time zone
Screen
Window size
Cookies
Do Not Track
Online
How to use it
Your public IP address is the address your internet provider gives your router or phone connection; every website you visit sees it. When the page opens, it asks the ipify service which address your request came from and shows the IPv4 address and, if your connection supports it, the IPv6 address.
If you use a VPN or proxy, you will see the VPN server’s address instead, which is an easy way to check that the VPN is working. Many home connections use carrier-grade NAT, so several customers can share one public IPv4 address.
The table lists details every website can read without asking: the user agent string, preferred languages, time zone and screen size. Ad blockers or privacy extensions sometimes block the IP lookup; the page then tells you instead of showing a wrong value.
Frequently asked questions
Is my IP address stored?
Not by Lasstegnas. The lookup goes directly from your browser to api.ipify.org, which states that it does not log visitor IPs.
Can someone find my home address from my IP?
Usually only an approximate city or region. Your provider knows the exact subscriber, and only shares it with legal authority.
What is the difference between IPv4 and IPv6?
IPv4 addresses look like 203.0.113.7 and are running out; IPv6 addresses are longer, like 2001:db8::1, and are plentiful.