Among network tools, checking your IP address is the first step in development and system administration. This page keeps features minimal and focuses on finding your IP intuitively while sharing tips to stay secure against network exposure.
Internet communication works when your device (client) requests data from a website (server) and the server responds. Request packet headers must include a source IP so replies can be delivered. Therefore, every website you visit can detect and log your public IP in real time by design.
A public IP exists only once worldwide and is the official address your ISP assigns to your line. A private IP is virtually assigned inside your router (e.g., 192.168.0.x) for local identification on the internal network and cannot be used directly on the public internet.
The familiar format 123.45.67.89 is IPv4. Due to 32-bit address shortages, more ISPs now also assign IPv6 addresses such as 2001:0db8::ff00:42:8329, and depending on your device you may see IPv6 on this site as well.
When VPN is enabled, all your data passes through an encrypted tunnel to the VPN provider's gateway. The destination website then receives the VPN server's masked public IP instead of your ISP IP, hiding your real IP behind the routed address.
Large sites like Google and Naver compare collected IPs with logged-in account activity for personalized ads and security checks. An IP alone is not legally sensitive personal data like a national ID, but combined with other identifiers it becomes an important tracking clue. Be especially careful on public Wi-Fi or when using torrent clients where IP exposure is high.