What powers internationalsf.org?
Last seen Aug 2026 · 26 technologies across 13 categories
Analytics
CDN
Databases
Editors
JavaScript frameworks
JavaScript libraries
Miscellaneous
Programming languages
Security
Tag managers
Translation
Video players
Webmail
AI Crawlers
Does not block any of the 33 AI crawlers we track in its robots.txt. Checked Sep 2026.
Training crawlers
- Bytespider Allowed
- CCBot Allowed
- ClaudeBot Allowed
- Google-Extended Allowed
- GPTBot Allowed
Search and AI assistants
- PerplexityBot Allowed
The other 27 AI crawlers we track are not mentioned and only inherit the catch-all rules that apply to every crawler.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 79% desktop
- 21% phone
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.71 / 10 · ranked #756,924 of all domains
42 referring domains · OpenPageRank
Core Web Vitals
| LCP | 3.4 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 1900 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English (United States)
- CDN: Cloudflare
- Weight: 3.3 MB · 71 requests
- Structured data: JSON-LD, OpenGraph
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- The International School of San Francisco (International High School of San Francisco on Wikidata)
- Founded: 1962
- Industry: Education (declares
EducationalOrganization) - Country: United States
- Profiles: Facebook, Instagram, YouTube, LinkedIn
From the homepage's own structured data (Sep 2026) and Wikidata (CC0).
Infrastructure
- Hosted on Cloudflare (104.17.71.73)
- DNS: Network Solutions
- Email: Google Workspace
- Email security: SPF (soft fail), DMARC quarantine
- SSL: Let's Encrypt, ECDSA P256, expires Dec 2026
- Common Crawl link graph: rank 158,048, 3 hosts
- Verified with: Apple Business, Google
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Full technology history →
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