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 |
|---|---|---|---|
| lancaster.gov.uk | #242,614 | Drupal, Google Analytics, Meta Pixel + 1 more | Find emails |
| pegasus.de | #242,640 | AOS, Bluesky, Cloudflare edge/CDN + 13 more | Find emails |
| escanav.com | #242,657 | Bootstrap, GSAP, Swiper + 3 more | Find emails |
| #150 (Tranco) |
| Find emails |
| 5 | avast.com | #202 (Tranco) | Find emails |
| teconsite.es |
| #242,731 |
| Apache, Bootstrap, Font Awesome + 7 more |
| Find emails |
| nisd.net | #242,757 | Amazon Route 53, Drupal, Font Awesome + 6 more | Find emails |
| bizhost.kr | #242,767 | Livewire, Nginx, SweetAlert2 + 4 more | Find emails |
| qas.com | #242,788 | Imperva | Find emails |
| yakup.com | #242,849 | Apache, Google Analytics, Google Hosted Libraries + 5 more | Find emails |
| akton.net | #242,891 | Apache, Bootstrap, PHP + 2 more | Find emails |
| relatoriounico.pt | #242,912 | Cloudflare | Find emails |
| irtve.es | #242,968 | Fastly, Alpine.js | Find emails |
| grooveoffers.com | #242,977 | Cloudflare, Nginx | Find emails |
| starbucks.bg | #242,984 | CSC (Digital Brand Services), Cloudflare edge/CDN, Google Tag Manager + 3 more | Find emails |
| pacsonweb.com | #243,020 | Cloudflare | Find emails |
| muenchen-klinik.de | #243,029 | Apache, Consentmanager.net, Google Tag Manager + 1 more | Find emails |
| crim.ca | #243,068 | Apache, CookieYes, Font Awesome + 10 more | Find emails |
| prisonblock.com | #243,071 | Apache, Font Awesome, Google Analytics + 4 more | Find emails |
| 12andus.com | #243,100 | Bootstrap, Cloudflare Turnstile, Font Awesome + 9 more | Find emails |
| profitux.cz | #243,133 | Cookiebot, Google Fonts, HTMX + 6 more | Find emails |
| sos-childrensvillages.org | #243,171 | ASP.NET, Font Awesome, Google Tag Manager + 2 more | Find emails |
| cinemaparadiso.co.uk | #243,182 | ASP.NET, Google Fonts, Google Hosted Libraries + 8 more | Find emails |
| headandshoulders.com | #243,191 | Azure DNS, Azure Front Door, Contentful + 4 more | Find emails |
| readinga-z.com | #243,240 | Cloudflare Bot Management, Cloudflare Turnstile, Cloudflare edge/CDN | Find emails |
| hkk.de | #243,247 | ConsentMo, Google Tag Manager, Nginx + 4 more | Find emails |
| membershipworks.com | #243,417 | Amazon Route 53, Apache, Pingdom + 2 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 →