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 |
|---|---|---|---|
| mbed.org | #138,090 | Amazon Route 53, GitHub, GitHub Pages | Find emails |
| finaax.com | #138,126 | Cloudflare Images, Google Fonts, NS1 + 1 more | Find emails |
| tpay.com | #138,181 | Algolia, Cloudflare, Cloudflare Bot Management + 14 more | Find emails |
| #150 (Tranco) |
| Find emails |
| 5 | avast.com | #202 (Tranco) | Find emails |
| #138,237 |
| Apache |
| Find emails |
| 123roulement.com | #138,238 | Amazon Route 53, Didomi, Font Awesome + 2 more | Find emails |
| farmingdale.edu | #138,298 | Apache, Bluesky, Bootstrap + 10 more | Find emails |
| aholdusa.com | #138,389 | ASP.NET, Akamai Bot Manager, Akamai edge/CDN + 6 more | Find emails |
| webinar.fm | #138,428 | Google Analytics, Google Fonts, Google Tag Manager + 13 more | Find emails |
| meccahosting.com | #138,455 | Apache | Find emails |
| petra.ac.id | #138,459 | Cloudflare, Google Analytics, Google Tag Manager + 2 more | Find emails |
| netpresenter.com | #138,527 | AddToAny, Cloudflare, Cloudflare Bot Management + 9 more | Find emails |
| interracialdatingcentral.com | #138,577 | Amazon Route 53, Awin, Font Awesome + 11 more | Find emails |
| frigidaireapplianceparts.com | #138,640 | Amazon Route 53, Cloudflare edge/CDN | Find emails |
| previo.app | #138,678 | Nginx | Find emails |
| skekraft.net | #138,682 | ASP.NET, Bootstrap, Font Awesome + 5 more | Find emails |
| museum-joanneum.at | #138,695 | Apache, Microsoft 365, Swiper + 2 more | Find emails |
| cosmosdirekt.de | #138,702 | Apache, CoreMedia CMS, Imperva + 1 more | Find emails |
| pgcareers.com | #138,775 | Amazon CloudFront, Azure DNS, Google Maps + 6 more | Find emails |
| manulifebank.ca | #138,839 | Adobe Audience Manager, Adobe Experience Cloud (Launch), Adobe Experience Manager Edge Delivery (Helix RUM) + 8 more | Find emails |
| nyidanmark.dk | #138,875 | Font Awesome, Microsoft IIS, reCAPTCHA + 2 more | Find emails |
| 2mcl.com | #138,902 | Bootstrap, Font Awesome, Nginx + 5 more | Find emails |
| scalehobbyist.com | #138,934 | Apache, Google Analytics, Google Tag Manager + 2 more | Find emails |
| wooriwebs.com | #138,953 | AOS, Apache, Font Awesome + 6 more | Find emails |
| bn-online.net | #138,980 | Apache, CCM19, TYPO3 | Find emails |
| torontomulticulturalcalendar.com | #138,988 | Apache, Bootstrap, Feedburner + 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 25, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →