Last updated: 23 September 2026
NetCheck respects your privacy. This page explains clearly what happens to data when you use the site.
The domains, URLs or addresses you enter are used solely to run the network query you asked for (DNS, WHOIS, SSL…). Those queries are read-only and their results are neither stored nor linked to you.
The DNS lookup and propagation tools query public DNS resolvers (Google, Cloudflare and AdGuard) directly from your browser; the "My IP" tool queries the ipapi.co service. Those services therefore receive the domain you look up or your IP address, under their own policies. WHOIS, SSL and HTTP header lookups go through our server and are not stored.
No sign-up is required. We only use:
The site is funded by advertising (Google AdSense, for example). These partners may use cookies to serve relevant ads. You can manage personalised advertising in your Google ad settings. A consent banner lets you accept or refuse non-essential cookies (GDPR).
You can ask to access, correct or delete a message you sent us, using the contact form. You can also contact the data protection authority in your country. For data processed by Google, please refer to Google's own policies.
If you write to us, we keep your name, email address, subject and message, solely to reply to you. Only the site operator can read them; they are never sold, shared or used for marketing. Only the 500 most recent messages are kept, and older ones are deleted automatically. To prevent abuse, the number of messages per connection is limited using a non-reversible fingerprint of the IP address.
For any question, write to us via the About & contact page.