What powers 
simonsobservatory.org?
Last seen Sep 2026 · 18 technologies across 15 categories
Caching
Varnish
since Aug 2025
CDN
Fastly
since Aug 2025
CMS
WordPress
since Jul 2022
Databases
Font scripts
Font Awesome
since Sep 2026
Google Font API
since Jul 2022
Hosting
GoDaddy
since Aug 2022
JavaScript libraries
PaaS
Pantheon
since Aug 2025
Page builders
WordPress Site Editor
since Aug 2025
Performance
Priority Hints
since Sep 2023
Programming languages
PHP
since Jul 2022
Security
HSTS
since Sep 2022
UI frameworks
Tailwind CSS
since Aug 2025
Web servers
Nginx
since Jul 2022
WordPress plugins
AI Crawlers
Doesn't name any of the 33 AI crawlers we track in its robots.txt. Catch-all rules (User-agent: *) restrict some paths for every crawler, AI or not. Checked Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Open Page Rank
4.72 / 10 · ranked #296,728 of all domains
95 referring domains · OpenPageRank
Page
- Language: English (United States)
- CDN: Fastly
- Weight: 23.2 MB · 53 requests
- WordPress theme: simonsobservatory · all themes
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on Fastly (23.185.0.4)
- DNS: GoDaddy DNS
- Email: ucsd.edu
- Email security: no SPF record, no DMARC record
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 41,297, 2 hosts
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Full technology history →
Report an incorrect detection
Recent changes
- detected Contact Form 7 Jul 2026
- detected Fastly Jul 2026
- detected GoDaddy Jul 2026
- detected Google Font API Jul 2026
- detected HSTS Jul 2026
- detected jQuery Jul 2026
- detected jQuery Migrate Jul 2026
- detected MariaDB Jul 2026
- detected MySQL Jul 2026
- detected Nginx Jul 2026
- detected Pantheon Jul 2026
- detected PHP Jul 2026
- detected Priority Hints Jul 2026
- detected Tailwind CSS Jul 2026
- detected Varnish Jul 2026
- detected WordPress Jul 2026
- detected WordPress Site Editor Jul 2026