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 |
|---|---|---|---|
| theinvestor.co.kr | #256,539 | Google Analytics, Nginx, Slick Carousel + 3 more | Find emails |
| paradisi.de | #256,555 | Apache, OpenCMP | Find emails |
| zagreb-airport.hr | #256,557 | Microsoft 365, Nginx | Find emails |
| #150 (Tranco) |
| Find emails |
| 5 | avast.com | #202 (Tranco) | Find emails |
| #256,564 |
| DoubleClick (Google Ads), Fancybox, Google Publisher Tag + 7 more |
| Find emails |
| hmhospitales.com | #256,591 | Cloudflare, Cloudflare edge/CDN, Cookiebot + 4 more | Find emails |
| picoauto.com | #256,641 | Cloudflare, Cloudflare Bot Management, Cloudflare Turnstile + 1 more | Find emails |
| aerztefinanzen.de | #256,665 | Apache, Google Tag Manager, mod_pagespeed | Find emails |
| simtk.org | #256,744 | Apache, Bootstrap, Flaticon + 3 more | Find emails |
| brenet.de | #256,758 | Apache, Bootstrap, Font Awesome + 10 more | Find emails |
| uqroo.mx | #256,766 | Apache, Bootstrap, Google Analytics + 5 more | Find emails |
| agila.de | #256,774 | Apache, Azure DNS, Bootstrap + 10 more | Find emails |
| failteireland.ie | #256,824 | ASP.NET, Azure API Management, Azure DNS + 5 more | Find emails |
| changwon.ac.kr | #256,828 | — | Find emails |
| rankboss.shop | #256,829 | Google Analytics, Google Fonts, Google Tag Manager + 3 more | Find emails |
| itecoserv.ro | #256,831 | LiteSpeed | Find emails |
| rdoequipment.com | #256,888 | Amazon Route 53, Azure API Management, Google Tag Manager + 4 more | Find emails |
| deutscheaerztefinanz.com | #256,892 | Apache, Google Tag Manager, mod_pagespeed | Find emails |
| gaziantep.edu.tr | #256,912 | Apache, Bootstrap, Fancybox + 10 more | Find emails |
| allmyusjobs.com | #256,919 | Apache, Font Awesome, Google Fonts + 10 more | Find emails |
| kubota-eu.com | #256,945 | Cloudflare edge/CDN, Divi, Google Fonts + 8 more | Find emails |
| suachuamaybienap.com | #256,970 | LiteSpeed, MediaWiki, PHP | Find emails |
| arpae.it | #257,041 | Azure DNS, Matomo, Plone + 2 more | Find emails |
| twinstar.eu | #257,177 | Apache, Awin, Google Tag Manager + 2 more | Find emails |
| lh.com | #257,191 | Cloudflare Bot Management, Cloudflare Web Analytics, Cloudflare edge/CDN | Find emails |
| spacelordsthegame.com | #257,226 | Bootstrap, Cookie-Script, Fancybox + 7 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 →