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 |
|---|---|---|---|
| visale.fr | #142,172 | Divi, Google Fonts, Google Tag Manager + 2 more | Find emails |
| essex.gov.uk | #142,184 | Amazon CloudFront, Azure DNS, Drupal + 4 more | Find emails |
| daocloud.io | #142,197 | Baidu Analytics, Font Awesome, Nginx + 3 more | Find emails |
| #150 (Tranco) |
| Find emails |
| 5 | avast.com | #202 (Tranco) | Find emails |
| gov4c.kz |
| #142,199 |
| Bitrix, Google Analytics, Google Fonts + 9 more |
| Find emails |
| smk.dk | #142,357 | Cookie Information, Mailchimp, Meta Pixel + 7 more | Find emails |
| formdesk.com | #142,364 | Fancybox, Google Tag Manager, Gravatar + 6 more | Find emails |
| ucatolica.edu.co | #142,379 | Apache, Microsoft 365 | Find emails |
| boersenblatt.net | #142,382 | Drupal, Font Awesome, Google Analytics + 6 more | Find emails |
| alanwood.net | #142,387 | Apache | Find emails |
| 66tutup.com | #142,399 | Cloudflare, Nginx | Find emails |
| tgjonesonline.co.uk | #142,425 | CSC (Digital Brand Services), Cloudflare Bot Management, Cloudflare Turnstile + 2 more | Find emails |
| optimaitalia.com | #142,529 | Adobe Fonts (Typekit), Apache, Bootstrap + 5 more | Find emails |
| kendalkab.go.id | #142,573 | Bootstrap, Font Awesome, Google Fonts + 6 more | Find emails |
| morleyprofessional.co.uk | #142,577 | Apache, OneTrust, vBulletin | Find emails |
| btkakademi.gov.tr | #142,581 | Ahrefs Analytics, Azure DNS, Dynatrace + 3 more | Find emails |
| lapedrera.com | #142,610 | Google Tag Manager, Microsoft 365, Nginx + 1 more | Find emails |
| board.com | #142,651 | Azure DNS, Cloudflare Bot Management, Cloudflare edge/CDN + 15 more | Find emails |
| ocoderre.com | #142,666 | Google Analytics, LiteSpeed, PHP + 3 more | Find emails |
| finect.com | #142,687 | Express, Sourcepoint, YouTube + 1 more | Find emails |
| atlantasunbelt.com | #142,727 | Microsoft 365, jQuery | Find emails |
| sobreip.com.br | #142,878 | Amazon Route 53, Bootstrap, Font Awesome + 4 more | Find emails |
| vodoplay.tv | #142,914 | Apache, cdnjs | Find emails |
| upperdeckepack.com | #142,943 | ASP.NET, Amazon Route 53, Font Awesome + 9 more | Find emails |
| fredolsencruises.com | #142,961 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 5 more | Find emails |
| ud.link | #142,971 | Amazon Route 53, OpenResty | 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 →