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.
Other ssl/tls certificates
| # | 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 |
|---|---|---|---|
| ntus.edu.tw | #223,131 | AOS, Apache, Bootstrap + 10 more | Find emails |
| se3v5tjfff3aet.me | #223,140 | Cloudflare, Cloudflare edge/CDN | Find emails |
| optumserve.com | #223,181 | Adobe Advertising Cloud, Adobe Audience Manager, Adobe Experience Cloud (Launch) + 6 more | Find emails |
| #150 (Tranco) |
| Find emails |
| 5 | avast.com | #202 (Tranco) | Find emails |
| libertyx.com |
| #223,184 |
| Amazon Route 53, Google Ads Conversion, Google Analytics + 2 more |
| Find emails |
| jbservers.net | #223,193 | Apache, Crisp, Font Awesome | Find emails |
| japanbasketball.jp | #223,411 | Amazon CloudFront, Google Analytics, Google Tag Manager + 5 more | Find emails |
| efeler.bel.tr | #223,444 | AOS, Bootstrap, Fancybox + 12 more | Find emails |
| kerknet.be | #223,484 | Adobe Fonts (Typekit), Apache, Drupal + 6 more | Find emails |
| antheminc.com | #223,494 | Adobe Experience Cloud (Launch), Adobe Experience Manager Edge Delivery (Helix RUM), Akamai Edge DNS + 1 more | Find emails |
| ename.cn | #223,507 | Baidu Analytics, CNZZ, Nginx + 1 more | Find emails |
| cbldf.org | #223,509 | Apache, Font Awesome, Google Fonts + 3 more | Find emails |
| summacollege.nl | #223,530 | Google Maps, Nginx, WordPress + 1 more | Find emails |
| mycci.net | #223,542 | AWS WAF, Amazon Web Services, AWS WAF CAPTCHA | Find emails |
| chu-montpellier.fr | #223,545 | Matomo, Microsoft 365, Nginx + 3 more | Find emails |
| 37486131.xyz | #223,567 | LiteSpeed, WordPress | Find emails |
| caixabankresearch.com | #223,617 | AddToAny, Apache, Cloudflare Turnstile + 3 more | Find emails |
| zohoinsights.com | #223,634 | — | Find emails |
| ahamove.com | #223,643 | Algolia, AppsFlyer, Docusaurus + 4 more | Find emails |
| bgwan.com | #223,678 | Apache, Google Analytics, Google Fonts + 3 more | Find emails |
| seduc.mt.gov.br | #223,703 | Bootstrap | Find emails |
| hqcollect.is | #223,711 | Ahrefs Analytics, Google Analytics, Google Tag Manager + 2 more | Find emails |
| cnw.com.au | #223,718 | AOS, Cloudflare Bot Management, Cloudflare edge/CDN + 7 more | Find emails |
| 37486120.xyz | #223,770 | LiteSpeed, WordPress | Find emails |
| slagharen.com | #223,788 | Fastly, Google Tag Manager, LiveChat + 8 more | Find emails |
| segurossura.com.co | #223,835 | ConsentMo, Google Analytics, Google Tag Manager + 5 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 29, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →