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 |
|---|---|---|---|
| davaocity.gov.ph | #251,691 | Bootstrap, Font Awesome, Google Fonts + 12 more | Find emails |
| inda.hu | #251,719 | Apache, Google Hosted Libraries, Meta Pixel + 1 more | Find emails |
| foscarini.com | #251,724 | Font Awesome, Foundation, Google Tag Manager + 8 more | Find emails |
| #150 (Tranco) |
| Find emails |
| 5 | avast.com | #202 (Tranco) | Find emails |
| flpi.com | #251,725 | Apache, Google Hosted Libraries, jQuery + 1 more | Find emails |
| avtopro.es | #251,734 | ASP.NET, Azure API Management, Azure DNS + 4 more | Find emails |
| buygenerics.com | #251,764 | Bootstrap, Cloudflare, Cloudflare Turnstile + 7 more | Find emails |
| ecotricity.co.uk | #251,807 | Amazon CloudFront, Amazon Route 53, Amazon S3 + 7 more | Find emails |
| tp.edu.sg | #251,812 | Adobe Experience Cloud (Launch), Adobe Experience Manager Edge Delivery (Helix RUM), Akamai Edge DNS + 14 more | Find emails |
| stateofohio.net | #251,880 | Apache, Google AdSense, GoDaddy | Find emails |
| dimanoinmano.it | #252,056 | Apache, Bootstrap, Font Awesome + 10 more | Find emails |
| hostingserver.nl | #252,058 | Nginx | Find emails |
| fts368.com | #252,071 | ASP.NET, Bootstrap, Cloudflare edge/CDN + 1 more | Find emails |
| partshotlines.com | #252,075 | Apache, Google Analytics, Google Tag Manager + 2 more | Find emails |
| geniushomes.nl | #252,077 | Amazon Route 53, Apache, Google Fonts + 6 more | Find emails |
| opcoep.fr | #252,095 | Drupal, Google Tag Manager, Nginx + 2 more | Find emails |
| journals.ac.za | #252,107 | Apache, Font Awesome, Open Journal Systems + 4 more | Find emails |
| hiretech.com | #252,291 | Akamai Edge DNS, Bootstrap, Font Awesome + 8 more | Find emails |
| cityhomes.com | #252,338 | Google Tag Manager, Next.js, Nginx + 2 more | Find emails |
| crue.org | #252,339 | Bluesky, Bunny CDN, BunnyCDN + 10 more | Find emails |
| machinerypark.in | #252,342 | DoubleClick (Google Ads), Google Analytics | Find emails |
| kyungnam.ac.kr | #252,347 | Apache, Daum, Fancybox + 10 more | Find emails |
| maindigitalstream.com | #252,388 | Apache, Cloudflare | Find emails |
| desjardinsassurancesgenerales.com | #252,408 | Adobe Experience Manager Edge Delivery (Helix RUM), Akamai Bot Manager, Akamai Edge DNS + 2 more | Find emails |
| ure.es | #252,411 | Apache, Bootstrap, Font Awesome + 8 more | Find emails |
| syspectr.com | #252,454 | Nginx, WordPress, Yoast SEO + 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 →