What powers 
harpercollins.pl?
Last seen Oct 2026 · 19 technologies across 10 categories
Analytics
CDN
Cookie compliance
Ecommerce
JavaScript libraries
Miscellaneous
Security
Tag managers
UI frameworks
Web servers
AI Crawlers
Blocks 9 of 33 AI crawlers we track by name in its robots.txt. Checked Nov 2026.
Training crawlers
- AI2Bot Blocked
- Bytespider Blocked
- ClaudeBot Blocked
- Diffbot Blocked
- FacebookBot Blocked
- GPTBot Blocked
- img2dataset Blocked
- meta-externalagent Blocked
Search and AI assistants
- Amazonbot Blocked
The other 24 AI crawlers we track are not mentioned and only inherit the catch-all rules that apply to every crawler.
- robots.txt found
- llms.txt found
- ai.txt not found
AI Crawlers
9 of 33 AI crawlers blocked
Standards: llms.txt
Audience
- 85% phone
- 15% desktop
Poland
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.56 / 10 · ranked #393,071 of all domains
79 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.4 s |
| INP | 125 ms |
| CLS | 0.1 |
| TTFB | 900 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Polish
- Weight: 6.8 MB · 58 requests
- Structured data: JSON-LD, OpenGraph
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on PL-BEYOND-AS Beyond.pl sp. z o.o. (5.149.162.49)
- DNS: markmonitor.com
- Email: Proofpoint Essentials
- Email security: SPF (hard fail), DMARC reject, MTA-STS, BIMI
- SSL: Certum, RSA 4096, wildcard, expires Dec 2026
- Common Crawl link graph: rank 3,072,341, 2 hosts
- Verified with: Atlassian, KnowBe4
DNS records as swept Nov 2026, certificate as seen Nov 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.harpercollins.pl | 16 |
| harpercollins.pl | 12 |