What powers harpercollins.nl?
Last seen Sep 2026 · 23 technologies across 15 categories
Analytics
CDN
CMS
Cookie compliance
Databases
JavaScript frameworks
JavaScript libraries
Marketing automation
Miscellaneous
PaaS
Programming languages
Security
Tag managers
Web Servers
WordPress plugins
AI Crawlers
Blocks all crawlers by default in robots.txt (User-agent: *). Checked Oct 2026.
Training crawlers
- Google-Extended Blocked
- GPTBot Blocked
Search and AI assistants
- Applebot Restricted
The other 30 AI crawlers we track are not mentioned and are blocked by the catch-all rule (User-agent: *).
- robots.txt found
- llms.txt not checked
- ai.txt not checked
AI Crawlers
All crawlers blocked
Audience
- 65% phone
- 31% desktop
- 4% tablet
Netherlands
Belgium
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.69 / 10 · ranked #355,560 of all domains
74 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.4 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 800 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English (United States)
- CDN: Cloudflare
- Weight: 16.0 MB · 155 requests
- WordPress theme: harper-collins-global (child: harper-collins-holl-child) · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on Cloudflare (162.159.135.42)
- DNS: markmonitor.com
- Email: Proofpoint Essentials
- Email security: SPF (soft fail), DMARC reject
- SSL: Google Trust Services, ECDSA P256, wildcard, expires Dec 2026
- Common Crawl link graph: rank 509,372, 3 hosts
- Verified with: Atlassian, Google, KnowBe4, Shopify, Yahoo
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.harpercollins.nl | 22 |
| newsletter.harpercollins.nl | 1 |