What powers postcalc.ru?
Last seen Aug 2026 · 6 technologies across 4 categories
Analytics
CDN
Miscellaneous
Web Servers
AI Crawlers
Blocks all crawlers by default in robots.txt (User-agent: *). Checked Sep 2026.
Training crawlers
- Bytespider Restricted
- ClaudeBot Restricted
- Google-Extended Restricted
- GPTBot Restricted
Search and AI assistants
- Amazonbot Restricted
- Applebot Restricted
- OAI-SearchBot Restricted
- PerplexityBot Restricted
User-request fetchers
- ChatGPT-User Restricted
The other 24 AI crawlers we track are not mentioned and are blocked by the catch-all rule (User-agent: *).
- robots.txt found
- llms.txt not found
- ai.txt not found
- Sep 2026 chatgpt-user added to robots.txt
- Sep 2026 amazonbot added to robots.txt
- Sep 2026 applebot added to robots.txt
- Sep 2026 bytespider added to robots.txt
- Sep 2026 perplexitybot added to robots.txt
- Sep 2026 claudebot added to robots.txt
AI Crawlers
All crawlers blocked
Audience
- 86% phone
- 14% desktop
Russia
Germany
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.69 / 10 · ranked #319,200 of all domains
119 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.9 s |
| INP | 100 ms |
| CLS | 0 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English
- Weight: 0.3 MB · 23 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on ADMINVPS (185.250.47.17)
- DNS: REG.RU
- Email: no MX record returned
- SSL: Let's Encrypt, ECDSA P256, wildcard, expires Nov 2026
- Common Crawl link graph: rank 2,063,394, 8 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| en.postcalc.ru | 6 |
| postcalc.ru | 4 |
| www.postcalc.ru | 4 |
Full technology history →
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Recent changes
- detected Open Graph Jul 2026