About DNScope
A free, no-signup DNS intelligence platform that runs entirely in your browser — built by Circlelink because everyone deserves professional DNS tools without the paywall.
Why we built it
Most existing DNS tools online are either paid, ad-heavy, or hide the interesting features behind a "contact sales" wall. Meanwhile the primitives DNScope depends on — DNS-over-HTTPS, RDAP, Certificate Transparency, Shodan InternetDB, public geolocation APIs — are all open, free and easy to combine directly in a browser.
So we built 20+ tools around them in one clean interface: DNS lookups, subdomain discovery, WHOIS, port exposure, email authentication auditing, DNSSEC, propagation, geolocation, typosquatting, blacklist checking, and more. No signup, no API keys, no ads.
How it works
DNScope is a static single-page application. Every tool runs in your browser and calls public APIs directly. There is no DNScope backend server that could log your queries, rate-limit you, or become a bottleneck. When you type a domain into the DNS Lookup, your browser talks straight to Google's public DoH resolver.
For SEO, the static build step also prerenders every route with Puppeteer so search engines and social-media crawlers see real HTML content, not a JavaScript shell.
Tech stack
Public APIs we call
DNScope stands on the shoulders of several excellent open services. If you use DNScope commercially, consider supporting the ones that have paid tiers (Shodan) or sponsor programs (Cloudflare, Quad9):
Who built it
DNScope is designed and maintained by Circlelink— a Dutch web and infrastructure studio. If DNScope saves you time, hire us for the harder problems.