SSL/TLS Certificates
30,905 of the 1,000,000 top sites in our Tranco top-1M census run Sectigo (3.1%). 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 |
|---|---|---|---|
| rhul.ac.uk | #45,078 | ASP.NET, Adobe Fonts (Typekit), Azure API Management + 8 more | Find emails |
| booker.co.uk | #45,084 | Akamai edge/CDN, CSC (Digital Brand Services) | Find emails |
| nowtv.it | #45,106 | Adobe Experience Cloud (Launch), Akamai Edge DNS, Microsoft 365 + 5 more | Find emails |
| #150 (Tranco) |
| Find emails |
| 5 | avast.com | #202 (Tranco) | Find emails |
| newspaperarchive.com |
| #45,110 |
| Cloudflare, Cloudflare Bot Management, Cloudflare Turnstile + 2 more |
| Find emails |
| smartbox.com | #45,113 | Ahrefs Analytics, AppNexus (Xandr), BambooHR + 8 more | Find emails |
| techsoup.org | #45,121 | Amazon Route 53, Imperva | Find emails |
| lums.edu.pk | #45,122 | Apache, Bootstrap, Drupal + 15 more | Find emails |
| korelogic.com | #45,125 | Apache, Astro | Find emails |
| choosealicense.com | #45,190 | Fastly, GitHub, GitHub Pages + 4 more | Find emails |
| 4goodhosting.com | #45,202 | Ahrefs Analytics, Font Awesome, Google Analytics + 10 more | Find emails |
| uahosting.com.ua | #45,252 | Bootstrap, Google Analytics, Google Tag Manager + 7 more | Find emails |
| ralphlauren.co.uk | #45,288 | Adobe Experience Cloud (Launch), Akamai Bot Manager, Akamai edge/CDN + 13 more | Find emails |
| toulouse.fr | #45,304 | Tarte au Citron, jQuery | Find emails |
| bcferries.com | #45,306 | Apache, Bootstrap, Citrix NetScaler + 4 more | Find emails |
| fram.fr | #45,336 | Cloudflare edge/CDN, Google Cloud DNS, Microsoft 365 + 1 more | Find emails |
| alelo.com.br | #45,368 | Adobe Analytics, Adobe Experience Cloud (Launch), Adobe Target + 8 more | Find emails |
| desales.edu | #45,373 | ASP.NET, Adobe Fonts (Typekit), Ahrefs Analytics + 11 more | Find emails |
| fawesome.tv | #45,394 | Amazon Route 53, Apache, Bootstrap + 9 more | Find emails |
| cerberlab.net | #45,407 | Namecheap, Nginx | Find emails |
| wellcome.ac.uk | #45,434 | AWS WAF, Amazon CloudFront, Amazon Route 53 + 2 more | Find emails |
| nu.edu.kz | #45,516 | Apache, Google Analytics, Google Tag Manager + 3 more | Find emails |
| cruzio.com | #45,586 | Apache, Divi, Font Awesome + 8 more | Find emails |
| 21cnjy.com | #45,598 | Alibaba Cloud CDN, Baidu Analytics, jQuery | Find emails |
| apsu.edu | #45,629 | Adobe Fonts (Typekit), Amazon Route 53, Google Analytics + 10 more | Find emails |
| thinkyeah.com | #45,664 | Nginx | 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-2026-08-24-full), snapshot August 24, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →