What powers 
whispero.eu?
Last seen Oct 2026 · 12 technologies across 9 categories
CDN
Amazon CloudFront
since Aug 2023
Amazon S3
since Aug 2023
Amazon SES
since Aug 2023
Font scripts
Google Font API
since Aug 2023
JavaScript frameworks
JavaScript graphics
Chart.js
since Aug 2023
JavaScript libraries
Miscellaneous
PaaS
Amazon Web Services
since Aug 2023
Security
HSTS
since Dec 2024
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Nov 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.69 / 10 · ranked #333,183 of all domains
68 referring domains · OpenPageRank
Core Web Vitals
| LCP | 4.1 s |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English
- CDN: Amazon CloudFront
- Weight: 2.2 MB · 60 requests
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on Websupport (37.9.175.165, IPv6)
- DNS: Websupport
- Email: Amazon SES / WorkMail
- Email security: SPF (neutral), no DMARC record, DNSSEC signed
- SSL: Amazon Trust Services, RSA 2048, wildcard, expires Apr 2027
- Common Crawl link graph: rank 11,517,688, 3 hosts
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
- detected Amazon CloudFront Jul 2026
- detected Amazon S3 Jul 2026
- detected Amazon SES Jul 2026
- detected Amazon Web Services Jul 2026
- detected Chart.js Jul 2026
- detected core-js Jul 2026
- detected Google Font API Jul 2026
- detected HSTS Jul 2026
- detected HTTP/3 Jul 2026
- detected JSS Jul 2026
- detected PWA Jul 2026
- detected React Jul 2026