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 |
|---|---|---|---|
| ui.ac.id | #12,353 | — | Find emails |
| trendmicro.co.jp | #12,404 | Akamai Edge DNS, Citrix NetScaler, Cludo + 5 more | Find emails |
| manitu.net | #12,416 | Apache, Bootstrap, Modernizr + 2 more | Find emails |
| #150 (Tranco) |
| Find emails |
| 5 | avast.com | #202 (Tranco) | Find emails |
| sheffield.ac.uk |
| #12,424 |
| Drupal, Fastly, Google Tag Manager |
| Find emails |
| whois.co.kr | #12,451 | Akamai Edge DNS, Apache, PHP | Find emails |
| sicoob.com.br | #12,455 | Bootstrap, Cloudflare Bot Management, Cloudflare edge/CDN + 4 more | Find emails |
| lacounty.gov | #12,468 | Disqus, Font Awesome, Google Analytics + 11 more | Find emails |
| optimum.net | #12,487 | Adobe Experience Cloud (Launch), Google Tag Manager, Medallia + 2 more | Find emails |
| adg.de | #12,514 | Nginx, PHP | Find emails |
| gleeze.com | #12,517 | ASP.NET, Bootstrap, Font Awesome + 4 more | Find emails |
| hrblock.com | #12,589 | Adobe Experience Cloud (Launch), Akamai edge/CDN, Azure DNS + 8 more | Find emails |
| ah.nl | #12,604 | Akamai Bot Manager, Akamai Edge DNS, Akamai edge/CDN + 5 more | Find emails |
| ranker.com | #12,606 | Cloudflare, Cloudflare Turnstile, Express + 3 more | Find emails |
| regions.com | #12,611 | Imperva | Find emails |
| solarweb.com | #12,617 | ASP.NET, Dynatrace, Google Tag Manager + 2 more | Find emails |
| yourtango.com | #12,647 | Amazon Advertising, DoubleClick (Google Ads), Drupal + 6 more | Find emails |
| plutotv.net | #12,662 | Ketch, NS1, Next.js + 3 more | Find emails |
| nominalia.com | #12,669 | Bootstrap, Font Awesome, Google Fonts + 3 more | Find emails |
| ionos.fr | #12,675 | Apache, Kameleoon, Next.js + 2 more | Find emails |
| bris.ac.uk | #12,719 | Apache, Google Tag Manager, Microsoft 365 + 1 more | Find emails |
| swiss.com | #12,734 | Cloudflare Bot Management, Cloudflare Turnstile, Cloudflare edge/CDN | Find emails |
| rada.gov.ua | #12,736 | Bootstrap, Font Awesome, Google Analytics + 5 more | Find emails |
| licelus.com | #12,785 | Google Hosted Libraries, Google Tag Manager, Jotform + 4 more | Find emails |
| pubhtml5.com | #12,806 | Cloudflare, Cloudflare edge/CDN, Cookiebot + 6 more | Find emails |
| spaceship.net | #12,822 | Cloudflare Bot Management, Cloudflare Turnstile, Cloudflare edge/CDN | 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 →