What powers qc.edu?
Last seen Sep 2026 · 12 technologies across 9 categories
Analytics
CDN
Editors
JavaScript libraries
Miscellaneous
Security
Tag managers
UI frameworks
Video players
AI Crawlers
robots.txt could not be read at the last check (Oct 2026), so its policy is unknown.
- robots.txt not checked
- llms.txt not checked
- ai.txt not checked
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
AI Crawlers
Policy unknown
Audience
- 66% desktop
- 34% phone
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
5.57 / 10 · ranked #150,554 of all domains
225 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.7 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English
- CDN: Cloudflare
- Weight: 3.5 MB · 74 requests
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Townsend Harris High School
- Founded: 1904
- Country: United States
From Wikidata (CC0).
Infrastructure
- Hosted on CITY-UNIVERSITY-OF-NEW-YORK (149.4.99.39)
- DNS: qc.ads
- Email: no MX record returned
- Email security: SPF (hard fail), DMARC reject
- SSL: Google Trust Services, ECDSA P256, expires Jan 2027
- Common Crawl link graph: rank 41,379, 26 hosts
- Verified with: Microsoft 365
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 Babel Jul 2026
- detected Cloudflare Jul 2026
- detected Cloudflare Bot Management Jul 2026
- detected core-js Jul 2026
- detected DreamWeaver Jul 2026
- detected Google Analytics Jul 2026
- detected Google Tag Manager Jul 2026
- detected HSTS Jul 2026
- detected jQuery Jul 2026
- detected List.js Jul 2026
- detected Tailwind CSS Jul 2026
- detected YouTube Jul 2026
- dropped Java Apr 2026
- detected Cloudflare Bot Management Dec 2025
- detected YouTube Nov 2025