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 |
|---|---|---|---|
| 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 |
| #150 (Tranco) |
| Find emails |
| 5 | avast.com | #202 (Tranco) | Find emails |
| 21cnjy.com |
| #45,598 |
| Alibaba Cloud CDN, Baidu Analytics, Baidu Maps + 2 more |
| Find emails |
| apsu.edu | #45,629 | Adobe Fonts (Typekit), Amazon Route 53, Google Analytics + 11 more | Find emails |
| thinkyeah.com | #45,664 | Nginx | Find emails |
| dynaccess.de | #45,701 | Apache | Find emails |
| ukhost4u.com | #45,710 | Awin, Bootstrap, Cloudflare + 9 more | Find emails |
| bpweb.net | #45,734 | Apache | Find emails |
| sunderland.ac.uk | #45,757 | Contensis, Google Fonts, Microsoft 365 + 1 more | Find emails |
| pinsentmasons.com | #45,763 | Azure API Management, Cloudflare edge/CDN | Find emails |
| idescat.cat | #45,775 | Apache, Google Analytics, Google Tag Manager + 2 more | Find emails |
| dns-systems.net | #45,794 | Apache | Find emails |
| prysmian.com | #45,832 | Amazon Route 53, Cloudflare edge/CDN, Cookiebot + 5 more | Find emails |
| canadalife.com | #45,890 | Adobe Experience Cloud (Launch), AppDynamics, OneTrust + 1 more | Find emails |
| optimum.com | #45,900 | Adobe Experience Cloud (Launch), Bazaarvoice, CHEQ + 10 more | Find emails |
| klarmobil.de | #45,924 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 6 more | Find emails |
| teleperformance.com | #45,981 | AOS, ASP.NET, Azure API Management + 12 more | Find emails |
| ppdi.com | #46,020 | AddToAny, Brightcove, Cloudflare Bot Management + 9 more | Find emails |
| unimap.edu.my | #46,145 | Apache | Find emails |
| zid.com | #46,164 | ASP.NET, FreePrivacyPolicy, Google Ads Conversion + 6 more | Find emails |
| by.me | #46,205 | Amazon Route 53, Fancybox, Nginx + 2 more | Find emails |
| foundationcenter.org | #46,208 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 8 more | Find emails |
| ucv.edu.pe | #46,218 | Express, Font Awesome, Google Analytics + 4 more | Find emails |
| ccv.eu | #46,220 | Cloudflare, Cookiebot, Drupal + 6 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 →