What powers 
karpov.courses?
Last seen Oct 2026 · 33 technologies across 17 categories
Analytics
CMS
Databases
Font scripts
JavaScript frameworks
JavaScript libraries
Marketing automation
Miscellaneous
Operating systems
Programming languages
Security
Tag managers
UI frameworks
Web frameworks
Web server extensions
Web servers
WordPress plugins
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Nov 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
- Nov 2026 robots.txt appeared
- Nov 2026 * added to robots.txt
- Sep 2026 * removed from robots.txt
- Sep 2026 robots.txt removed
- Aug 2026 *: Restricted (was Allowed)
- Aug 2026 *: Allowed (was Restricted)
AI Crawlers
No AI crawlers blocked
Audience
- 76% desktop
- 24% phone
Russia
Germany
Kazakhstan
Netherlands
United States
Belarus
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.64 / 10 · ranked #380,173 of all domains
57 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.6 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 1300 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Weight: 5.3 MB · 200 requests
- Structured data: JSON-LD, OpenGraph
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- karpov.courses
From the homepage's own structured data (Oct 2026).
Infrastructure
- Registered Nov 2019 (6 years) via Key-Systems LLC, renews Nov 2027
- Hosted on DDoS-Guard (185.215.4.53)
- DNS: Mail.ru
- Email: Yandex 360
- Email security: SPF, no DMARC record
- SSL: Let's Encrypt, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 2,106,852, 7 hosts
- Verified with: Yandex Webmaster
DNS records as swept Oct 2026, certificate as seen Oct 2026, registration from the registry's RDAP service. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| blog.karpov.courses | 17 |
| lab.karpov.courses | 13 |
| karpov.courses | 10 |
| id.karpov.courses | 7 |
| jupyter.k8s.karpov.courses | 4 |
Full technology history →
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Recent changes
- detected jQuery Migrate May 2026
- dropped Angie Mar 2026
- dropped C Mar 2026
- dropped Perl Mar 2026
- dropped Unpkg Mar 2026
- detected Twitter Emoji (Twemoji) Dec 2025
- detected Unpkg Dec 2025