Because IP addresses reveal location data, many people wonder about the legalities surrounding them. Is it illegal for a website to log your IP? Is it illegal for another person to find out what your IP address is? The short answer is: Tracking an IP address is generally perfectly legal, but what you do with it might not be.
IP Addresses are Public by Design
To understand the law, you must understand the technology. IP addresses are fundamentally public. Whenever you connect to a server—whether it's a website, a multiplayer game, or a peer-to-peer download—your device must share its IP address so the server knows where to send the data back. It is impossible to use the standard internet without exposing your IP address to the services you connect to.
For Websites and Businesses
It is entirely legal for websites to log the IP addresses of their visitors. They do this for analytics, to prevent spam, and to manage server load. However, privacy laws like the GDPR in Europe classify IP addresses as "personal data." This means that while a website can log it, they must disclose that they are doing so in their privacy policy, and they must protect that data from breaches.
For Individuals
If you are playing an online game and a server admin "pulls your IP" to see what city you are in, no laws have been broken. Looking up an IP address on a geolocation tool (like ours) is completely legal because all the tool does is query a public database.
When Does it Become Illegal?
The IP address itself is not the issue; the intent is what matters.
- DDoS Attacks: Using an IP address to launch a Distributed Denial of Service attack against someone's home network is a serious cybercrime in almost every jurisdiction.
- Harassment and Stalking: Using IP geolocation data to physically stalk, harass, or dox (publish private information about) someone is illegal under various harassment laws.
- Hacking: Scanning the ports of an IP address to find vulnerabilities and break into the network is unauthorized access and is highly illegal.
In short: knowing an IP address is legal. Using that IP address to cause harm is not.