What powers 
obs.org?
Last seen Oct 2026 · 31 technologies across 15 categories
Accessibility
Analytics
CDN
Databases
JavaScript frameworks
JavaScript libraries
Marketing automation
Miscellaneous
PaaS
Security
Tag managers
UI frameworks
Video players
Webmail
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 Nov 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 62% desktop
- 38% phone
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.41 / 10 · ranked #994,553 of all domains
50 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.2 s |
| INP | 50 ms |
| CLS | 0.15 |
| TTFB | 1500 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English (United States)
- CDN: Cloudflare
- Weight: 24.5 MB · 125 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Overbrook School for the Blind
- Founded: 1832
- Country: United States
From Wikidata (CC0).
Infrastructure
- Hosted on Cloudflare (104.17.38.2)
- DNS: Network Solutions
- Email: Google Workspace
- Email security: SPF (soft fail), DMARC monitor only, MTA-STS, BIMI
- SSL: Google Trust Services, ECDSA P256, expires Dec 2026
- Common Crawl link graph: rank 1,193,974, 2 hosts
- Verified with: Adobe, Apple Business
DNS records as swept Nov 2026, certificate as seen Nov 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.obs.org | 31 |
| obs.org | 17 |
Full technology history →
Report an incorrect detection
Recent changes
- detected Firebase Oct 2026
- detected Google Tag Manager Oct 2026
- detected HSTS Oct 2026
- detected Htmx Oct 2026
- detected HTTP/3 Oct 2026
- detected libphonenumber Oct 2026
- detected Lightbox Oct 2026
- detected Moment.js Oct 2026
- detected Open Graph Oct 2026
- detected reCAPTCHA Oct 2026
- detected Selectize Oct 2026
- detected Stimulus Oct 2026
- detected VideoJS Oct 2026
- detected Amazon SES Aug 2026
- detected Amazon Web Services Aug 2026
- dropped DonorPerfect May 2026
- detected DonorPerfect Jan 2026