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 |
|---|---|---|---|
| augustana.edu | #115,328 | Amazon Route 53, ConsentMo, Drupal + 10 more | Find emails |
| hitit.edu.tr | #115,333 | ASP.NET, Fancybox, Font Awesome + 5 more | Find emails |
| car.gov.br | #115,378 | AngularJS, Bootstrap, Cloudflare + 5 more | Find emails |
| #150 (Tranco) |
| Find emails |
| 5 | avast.com | #202 (Tranco) | Find emails |
| lhsystems.com |
| #115,394 |
| Azure Front Door |
| Find emails |
| bausch.in | #115,406 | ASP.NET, AddThis, Fancybox + 3 more | Find emails |
| jhinvestments.com | #115,411 | Akamai Edge DNS, Akamai edge/CDN, Microsoft 365 | Find emails |
| baccarat.com | #115,415 | Cloudflare edge/CDN, Google Tag Manager, Hotjar + 4 more | Find emails |
| yesnic.com | #115,420 | Akamai Edge DNS, Apache, Google Analytics + 7 more | Find emails |
| nissan-api.net | #115,443 | Amazon Route 53 | Find emails |
| connectionsacademy.com | #115,444 | Akamai edge/CDN, Google Tag Manager, Microsoft 365 + 6 more | Find emails |
| sunsynk.net | #115,456 | Nginx, Webpack | Find emails |
| sgp.net.br | #115,476 | Cloudflare, Nginx | Find emails |
| pearsonhighered.com | #115,482 | Akamai Bot Manager, Akamai edge/CDN, Font Awesome + 6 more | Find emails |
| kuaikanmanhua.com | #115,506 | Express, Nuxt.js, OpenResty + 1 more | Find emails |
| simpleswap.io | #115,514 | Cloudflare, Next.js, Qrator + 1 more | Find emails |
| general-anzeiger-bonn.de | #115,533 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Tag Manager + 2 more | Find emails |
| adept.co.za | #115,546 | Apache, Divi, Google Ads Conversion + 9 more | Find emails |
| reg365.net | #115,548 | Apache, Google Tag Manager, Underscore.js + 3 more | Find emails |
| bestwestern.de | #115,596 | Apache, CleanTalk, Consentmanager.net + 10 more | Find emails |
| bausch.co.nz | #115,610 | ASP.NET, Fancybox, Google Analytics + 2 more | Find emails |
| mersin.edu.tr | #115,612 | Next.js, Nginx, Turbopack + 1 more | Find emails |
| mayocliniclabs.com | #115,631 | Akamai Bot Manager, Akamai Edge DNS, Akamai edge/CDN + 20 more | Find emails |
| sunny-portal.com | #115,677 | ASP.NET, Consentmanager.net, Google Tag Manager + 2 more | Find emails |
| lpb-bw.de | #115,680 | Matomo, Nginx, PHP + 2 more | Find emails |
| cumtb.edu.cn | #115,691 | jQuery, Vue.js | 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 →