What powers 
zeiss.pt?
Last seen Oct 2026 · 9 technologies across 7 categories
CMS
Cookie compliance
JavaScript frameworks
Miscellaneous
Programming languages
Security
Tag managers
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
- 78% desktop
- 22% phone
Portugal
Brazil
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.71 / 10 · ranked #759,528 of all domains
63 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.7 s |
| INP | 150 ms |
| CLS | 0.15 |
| TTFB | 1200 ms |
Real user p75, Chrome UX Report, Oct 2026.
Page
- Language: Portuguese (Portugal)
- CDN: Akamai
- Weight: 4.4 MB · 54 requests
- Structured data: JSON-LD, OpenGraph
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on Akamai (23.204.115.100, IPv6)
- DNS: Akamai Edge DNS
- Email: retarus.com
- Email security: SPF (hard fail), DMARC reject
- SSL: DigiCert, ECDSA P256, expires May 2027
- Common Crawl link graph: rank 10,869,855, 2 hosts
- Verified with: Google
DNS records as swept Nov 2026, certificate as seen Nov 2026. How the web is hosted
Full technology history →
Report an incorrect detection
Recent changes
- dropped core-js Mar 2026