What powers tetrasys.fi?
Last seen Aug 2026 · 13 technologies across 8 categories
CDN
Google Hosted Libraries
since Feb 2022
Font scripts
Google Font API
since Mar 2020
Hosting
Hetzner
since Nov 2023
JavaScript libraries
Miscellaneous
Payment processors
Stripe
since Nov 2023
Web frameworks
Web servers
Nginx
since Jun 2021
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
- Sep 2026 *: Allowed (was Restricted)
- Sep 2026 claudebot removed from robots.txt
- Sep 2026 meta-externalagent removed from robots.txt
AI Crawlers
No AI crawlers blocked
Open Page Rank
2.13 / 10 · ranked #3,249,532 of all domains
4 referring domains · OpenPageRank
Infrastructure
- Hosted on Hetzner (65.109.38.148)
- DNS: Hetzner
- Email: norpanet.net
- Email security: SPF (soft fail), DMARC monitor only, CAA
- SSL: Let's Encrypt, ECDSA P256, expires Dec 2026
- Common Crawl link graph: rank 13,674,198, 3 hosts
- Verified with: Google, Stripe, Yandex Webmaster
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted