What powers testerzy.pl?
Last seen Aug 2026 · 37 technologies across 17 categories
Analytics
CDN
CMS
Databases
Ecommerce
Font scripts
JavaScript Frameworks
JavaScript libraries
Marketing automation
Miscellaneous
Performance
Programming languages
Security
Web Frameworks
Web Servers
Widgets
WordPress plugins
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 Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 58% phone
- 42% desktop
Poland
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.70 / 10 · ranked #311,897 of all domains
56 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.1 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 600 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Polish (Poland)
- Weight: 2.7 MB · 72 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Industry: Professional services (declares
ProfessionalService)
From the homepage's own structured data (Sep 2026).
Infrastructure
- Hosted on CF-KRK (94.152.61.162)
- DNS: nazwa.pl
- Email: nazwa.pl
- Email security: SPF (hard fail), no DMARC record, DNSSEC signed, CAA
- SSL: nazwa.pl, ECDSA P384, wildcard, expires Feb 2027
- Common Crawl link graph: rank 636,708, 25 hosts
- Verified with: Google
DNS records as swept Aug 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| konferencja.testerzy.pl | 22 |
| testerzy.pl | 13 |
| walidator.testerzy.pl | 12 |
| 2019.konferencja.testerzy.pl | 11 |
| narzedzia.testerzy.pl | 10 |
| plus.testerzy.pl | 9 |
| szkolenia.testerzy.pl | 6 |
| www.testerzy.pl | 6 |
Full technology history →
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Recent changes
- dropped Babel Aug 2026