SSL/TLS Certificates
33,361 of the 1,000,000 top sites in our Tranco top-1M census run Sectigo (3.3%). A certificate authority that issues SSL/TLS certificates used to secure websites with HTTPS. Detection is homepage-level HTML/header fingerprinting, so a site can run Sectigo on other pages without it showing here.
| # | Domain | Global traffic rank | Contacts |
|---|---|---|---|
| 1 | github.com | #29 (Tranco) | Find emails |
| 2 | roblox.com | #73 (Tranco) | Find emails |
| 3 | nginx.com | #95 (Tranco) | Find emails |
| 4 | f5.com |
| Site | Tranco rank | Also detected | Contacts |
|---|---|---|---|
| monashcollege.edu.au | #116,475 | CSC (Digital Brand Services), Cloudflare Bot Management, Cloudflare Turnstile + 1 more | Find emails |
| spelinspektionen.se | #116,568 | ASP.NET, Google Fonts, Microsoft IIS + 1 more | Find emails |
| trackingtraffo.com | #116,599 | GoDaddy | Find emails |
| #150 (Tranco) |
| Find emails |
| 5 | avast.com | #202 (Tranco) | Find emails |
| hostinger.co.uk | #116,659 | Cloudflare Bot Management, Cloudflare Turnstile, Cloudflare edge/CDN + 6 more | Find emails |
| geektimes.ru | #116,699 | Google Fonts, Qrator, reCAPTCHA + 1 more | Find emails |
| hashcat.net | #116,714 | Google Workspace, Nginx, GoDaddy | Find emails |
| kinhtedothi.vn | #116,738 | Microsoft IIS | Find emails |
| ralphlauren.fr | #116,787 | Adobe Experience Cloud (Launch), Akamai Bot Manager, Akamai edge/CDN + 13 more | Find emails |
| axoft.com | #116,789 | Amazon Route 53, Fancybox, Font Awesome + 16 more | Find emails |
| choiceindia.com | #116,800 | Cloudflare, FingerprintJS, Google Fonts + 11 more | Find emails |
| way-nifty.com | #116,862 | Amazon Route 53, Nginx | Find emails |
| onlyplay.net | #116,930 | Amazon CloudFront, Amazon Route 53 | Find emails |
| signet.nl | #116,988 | Nginx | Find emails |
| mistertennis.com | #117,018 | Bootstrap, Criteo, Google Tag Manager + 9 more | Find emails |
| fddb.info | #117,037 | Apache, Cloudflare Bot Management, Cloudflare Turnstile + 13 more | Find emails |
| autotrac-online.com.br | #117,056 | Google Fonts, jQuery | Find emails |
| knopper.net | #117,062 | Apache | Find emails |
| art-prizes.com | #117,091 | Bootstrap, Fancybox, Font Awesome + 6 more | Find emails |
| nuvoton.com | #117,127 | Axios, Azure Front Door, Bootstrap + 11 more | Find emails |
| 1and1.es | #117,213 | Apache, Kameleoon, Next.js + 2 more | Find emails |
| saatchigallery.com | #117,222 | All in One SEO, Bootstrap, Cloudflare + 16 more | Find emails |
| infatica.io | #117,233 | CrazyEgg, DDoS-Guard, Fancybox + 5 more | Find emails |
| email-marriott.com | #117,289 | Akamai edge/CDN, Amazon Route 53 | Find emails |
| jbnu.ac.kr | #117,342 | — | Find emails |
| strazgraniczna.pl | #117,351 | Apache, Imperva, Leaflet + 2 more | Find emails |
Showing the first 10,000matches — add a filter to narrow.
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 25, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →