CAPTCHA & Bot Protection
3,100 of the 1,000,000 top sites in our Tranco top-1M census run AWS WAF CAPTCHA (0.3%). Amazon's CAPTCHA challenge product, part of AWS WAF's bot-mitigation features. Detection is homepage-level HTML/header fingerprinting, so a site can run AWS WAF CAPTCHA on other pages without it showing here.
Other captcha & bot protection
| # | Domain | Global traffic rank | Contacts |
|---|---|---|---|
| 1 | amazon.com | #25 (Tranco) | Find emails |
| 2 | imdb.com | #237 (Tranco) | Find emails |
| 3 | appsflyer.com | #302 (Tranco) | Find emails |
| 4 | amazon.co.uk |
| Site | Tranco rank | Also detected | Contacts |
|---|---|---|---|
| nanonet.go.jp | #750,841 | AWS WAF, Amazon CloudFront, Amazon Route 53 | Find emails |
| 1179king.com | #751,585 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 123win79.com | #751,703 | ASP.NET, Amazon (ACM), Amazon CloudFront + 4 more | Find emails |
| #313 (Tranco) |
| Find emails |
| 5 | checkpoint.com | #338 (Tranco) | Find emails |
| 123win91.com |
| #751,704 |
| ASP.NET, Amazon (ACM), Amazon CloudFront + 4 more |
| Find emails |
| 1go99.vip | #752,030 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 1ok999.net | #752,059 | ASP.NET, Amazon (ACM), Amazon CloudFront + 4 more | Find emails |
| 1tt88.vip | #752,102 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 2nohu.vip | #752,544 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 2ok999.net | #752,545 | ASP.NET, Amazon (ACM), Amazon CloudFront + 4 more | Find emails |
| 332649.com | #752,651 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 3333win.bet | #752,660 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 3333win.cc | #752,661 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 333win.win | #752,674 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 334760.com | #752,675 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 336475.com | #752,682 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 336732.com | #752,685 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 339049.com | #752,693 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 33win01.com | #752,716 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 33win02.com | #752,717 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 33win2.com | #752,718 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 33win33.com | #752,719 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 33win9.com | #752,720 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 33win99.com | #752,721 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 4mmoo.com | #753,291 | ASP.NET, Amazon (ACM), Amazon CloudFront + 6 more | Find emails |
| 534758.com | #753,395 | ASP.NET, Amazon (ACM), Amazon CloudFront + 5 more | Find emails |
From the Crawlora Website Tech Stack Dataset, a homepage-level fingerprint of a 1,000,000-domain Tranco top-1M census (run top1m-2026-08-25-full-v2), snapshot August 29, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →