What powers 
sdf1.org?
Last seen Apr 2026 · 5 technologies across 5 categories
Analytics
Google Analytics
since Feb 2024
Operating systems
UNIX
since Feb 2024
Programming languages
Web server extensions
Web servers
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 robots.txt appeared
- Sep 2026 * added to robots.txt
AI Crawlers
No AI crawlers blocked
Open Page Rank
3.53 / 10 · ranked #861,300 of all domains
49 referring domains · OpenPageRank
Infrastructure
- Hosted on HOPONE-GLOBAL (205.166.94.16)
- DNS: sdf.org
- Email: sdf.org
- Email security: no SPF record, no DMARC record
- SSL: Let's Encrypt, ECDSA P256, expires Dec 2026
- Common Crawl link graph: rank 525,070, 26 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted