What powers 
holocausthandbooks.com?
Last seen Sep 2026 · 13 technologies across 12 categories
Caching
WP Rocket
since Feb 2024
CMS
Databases
MySQL
since Jan 2024
JavaScript libraries
LazySizes
since Jul 2025
Miscellaneous
RSS
since Jan 2024
Page builders
WordPress Block Editor
since Jul 2024
Performance
Priority Hints
since Feb 2024
Programming languages
PHP
since Apr 2019
Security
HSTS
since Jan 2024
Web servers
Apache HTTP Server
since Mar 2026
WordPress plugins
Kadence WP Blocks
since Feb 2024
Polylang
since Mar 2024
WordPress themes
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 54% desktop
- 46% phone
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.46 / 10 · ranked #935,125 of all domains
69 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.3 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 800 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English (United States)
- Weight: 26.2 MB · 46 requests
- WordPress theme: kadence · all themes
- Structured data: Microdata
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on VERSAWEB-ASN (72.46.128.86)
- DNS: cprapid.com
- Email: holocausthandbooks.com
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Let's Encrypt, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 617,900, 2 hosts
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Full technology history →
Report an incorrect detection
Recent changes
- detected HSTS Jul 2026
- dropped HSTS Jun 2026
- dropped Nginx Apr 2026
- detected Apache HTTP Server Mar 2026
- detected HSTS Mar 2026
- dropped Redis Mar 2026
- dropped Redis Object Cache Mar 2026