How it works
Anti-Frontrunner checks domain availability from your browser using public DNS—never a search backend that can log, front-run, or steal your ideas.
What happens when you search
- You type a keyword or full domain in the search bar. That text stays on your device—Anti-Frontrunner has no server that receives it.
- Your browser builds a list of names to check across 16 popular extensions, ordered by your TLD priority region.
- For each name, your browser asks public DNS resolvers whether a record exists. No record usually means the name may be available.
- Results appear in place. If a name looks available, Register links take you to registrars—only when you choose to buy.
DNS, not registrar search
Most domain tools send your query to a registrar or broker API. That server can keep a log of what you typed—and domain frontrunners watch for exactly that.
Anti-Frontrunner uses a different path: DNS-over-HTTPS lookups from your browser to Cloudflare and Google. We never sit in the middle. Your keywords are not stored on our infrastructure because there is no infrastructure for searches.
Split across two resolvers
Eight TLD checks go to Cloudflare DNS; eight go to Google Public DNS. All requests leave your device directly. Those providers have their own privacy policies and may see the domain names you look up plus your IP address.
We split traffic to spread load and stay resilient—not to collect data. Anti-Frontrunner does not proxy or log those requests.
What “available” means here
Available means no DNS record was found for that name—a useful signal, not a registrar guarantee. Parked domains, premium inventory, and reserved names can still show as available or taken incorrectly.
Always confirm price and registration at checkout before you count on a result.
What we store locally
Your TLD priority region (Global, US, UK, and so on) is saved in localStorage so ordering stays consistent between visits. That preference never leaves your browser unless you clear site data.