Anonymity Check

WebRTC is the browser technology behind video calls. To connect participants directly it asks the operating system for every network address of the device — and does so bypassing the VPN. As a result a site can see your real address even though all other traffic goes through the tunnel. This is the classic reason a VPN “does not work”. It is fixed with a browser extension or by disabling WebRTC in settings.

Your browser reports the system timezone to the site, while the IP address points to a country. If the IP is German but the device clock is set to Kyiv time, that is almost certainly a VPN: for an actual resident of Germany both values would match. This is exactly how sites spot users switching countries for pricing or content access. To avoid it, the system timezone has to match the exit country.

Not necessarily, but it is a visible signal. Home users reach the internet through consumer ISP addresses, not through data centres. If your address belongs to a hosting company, you are either using a VPN or proxy, or working through a corporate network. Many sites treat such addresses more strictly: they show captchas more often, restrict sign-ups or block payments.

No. The check runs at the moment of the request, the result is shown to you and nothing is written down — neither the IP nor the browser data. Some of the tests never leave your device at all: WebRTC, timezone, language and screen parameters are determined locally in the browser.