What powers lyceekastler.fr?
Last seen Aug 2026 · 23 technologies across 11 categories
CDN
CMS
Databases
Font scripts
JavaScript libraries
Miscellaneous
Page builders
Programming languages
Web servers
WordPress plugins
WordPress themes
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Aug 2026.
- robots.txt found
- llms.txt not checked
- ai.txt not checked
AI Crawlers
No AI crawlers blocked
Audience
- 80% phone
- 20% desktop
France
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.83 / 10 · ranked #1,921,363 of all domains
22 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.6 s |
| INP | 75 ms |
| CLS | 0.05 |
| TTFB | 1500 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: French (France)
- Weight: 6.5 MB · 102 requests
- WordPress theme: oceanwp (child: oceanwp-enfant) · all themes
- Structured data: JSON-LD, Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Lycée Alfred Kastler
From the homepage's own structured data (Sep 2026).
Infrastructure
- Hosted on CELESTE-AS CELESTE - Internet services provider (195.144.11.124)
- DNS: modns.fr
- Email: lyceekastler.fr
- Email security: no SPF record, no DMARC record
- SSL: Let's Encrypt, ECDSA P256, expires Dec 2026
- Common Crawl link graph: rank 2,247,192, 4 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Full technology history →
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Recent changes
- detected Open Graph May 2026
- detected Twitter Emoji (Twemoji) May 2026
- detected WordPress Block Editor May 2026
- detected Yoast SEO May 2026