SSL/TLS Certificates
30,031 of the 965,200 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 |
|---|---|---|---|
| ucl.ac.uk | #2,578 | Cloudflare Bot Management, Cloudflare edge/CDN, ConsentMo + 3 more | Find emails |
| hostpoint.ch | #2,594 | Google Tag Manager, Hugo | Find emails |
| strato.de | #2,625 | Bootstrap, Google Tag Manager, Google Workspace + 3 more | Find emails |
| #150 (Tranco) |
| Find emails |
| 5 | avast.com | #202 (Tranco) | Find emails |
| inmarsat.com |
| #2,633 |
| Adobe Audience Manager, Adobe Experience Cloud (Launch), Amazon CloudFront + 12 more |
| Find emails |
| nordvpn.com | #2,670 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN | Find emails |
| comodoca.com | #2,679 | Cloudflare Bot Management, Cloudflare edge/CDN, Drift + 11 more | Find emails |
| joinserver.xyz | #2,725 | Cloudflare, Font Awesome, Nginx + 2 more | Find emails |
| paramountplus.com | #2,730 | NS1, New Relic, OpenResty + 1 more | Find emails |
| kasserver.com | #2,742 | Nginx, jQuery | Find emails |
| kochava.com | #2,743 | Font Awesome, Google Cloud DNS, Google Tag Manager + 1 more | Find emails |
| cern.ch | #2,770 | Google Fonts, Microsoft 365, OpenResty + 1 more | Find emails |
| phys.org | #2,816 | Google Analytics, Google Publisher Tag, Google Tag Manager | Find emails |
| x-cdn-static.com | #2,819 | Amazon Route 53, Google Analytics, Google Fonts + 5 more | Find emails |
| swishapps.ai | #2,849 | Azure DNS | Find emails |
| bu.edu | #2,873 | Amazon CloudFront, New Relic, Nginx + 1 more | Find emails |
| thomsonreuters.com | #2,876 | Adobe Experience Cloud (Launch), Adobe Target, AppDynamics + 8 more | Find emails |
| c6gj-static.net | #2,878 | Amazon Route 53, Google Analytics, Google Fonts + 5 more | Find emails |
| optimove.net | #2,891 | Amazon Route 53, Microsoft 365 | Find emails |
| hybrid.ai | #2,903 | Cloudflare, Google Tag Manager, PHP | Find emails |
| libsyn.com | #2,927 | Bootstrap, Cloudflare Bot Management, Cloudflare edge/CDN + 12 more | Find emails |
| cf.lk | #2,931 | Font Awesome, Google Ads Conversion, Google Analytics + 6 more | Find emails |
| eurodns.com | #2,955 | Google Fonts, Google Tag Manager, Mailchimp | Find emails |
| gameloft.com | #2,979 | Google Tag Manager, Nginx | Find emails |
| cuny.edu | #2,996 | Adobe Fonts (Typekit), Nginx, WordPress | Find emails |
| namecheap.com | #3,017 | Cloudflare Bot Management, Cloudflare edge/CDN, Namecheap | 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 965,200-domain Tranco top-1M census (run top1m-2026-08-20-full), snapshot August 21, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →