What powers 
thermocalc.com?
Last seen Oct 2026 · 20 technologies across 15 categories
Analytics
Caching
CDN
CMS
Databases
Font scripts
Hosting panels
JavaScript libraries
Marketing automation
Miscellaneous
Programming languages
Tag managers
Web servers
Webmail
WordPress plugins
AI Crawlers
Restricts 14 of 33 AI crawlers we track by name in its robots.txt. Checked Nov 2026.
Training crawlers
- Applebot-Extended Restricted
- Bytespider Restricted
- CCBot Restricted
- ClaudeBot Restricted
- Google-Extended Restricted
- GPTBot Restricted
- meta-externalagent Restricted
Search and AI assistants
- Amazonbot Restricted
- Claude-SearchBot Restricted
- OAI-SearchBot Restricted
- PerplexityBot Restricted
User-request fetchers
- ChatGPT-User Restricted
- Claude-User Restricted
- Perplexity-User Restricted
The other 19 AI crawlers we track are not mentioned and stay allowed by default.
- robots.txt found
- llms.txt found
- ai.txt not found
- Oct 2026 oai-searchbot added to robots.txt
- Oct 2026 chatgpt-user added to robots.txt
- Oct 2026 claude-searchbot added to robots.txt
- Oct 2026 ccbot added to robots.txt
- Oct 2026 llms.txt appeared
- Oct 2026 amazonbot added to robots.txt
AI Crawlers
14 of 33 AI crawlers restricted
Standards: llms.txt
Audience
- 79% desktop
- 21% phone
India
United States
Türkiye
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.02 / 10 · ranked #551,271 of all domains
82 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.5 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 1500 ms |
Real user p75, Chrome UX Report, Oct 2026.
Page
- Language: English (United States)
- Weight: 2.9 MB · 22 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Thermo-Calc Software
- Country: Sweden
From Wikidata (CC0).
Infrastructure
- Registered Feb 2001 (25 years) via Abion AB, renews Feb 2027
- Hosted on BAHNHOF Bahnhof AB (85.24.159.75)
- Email: Microsoft 365
- Email security: SPF (soft fail), DMARC monitor only, CAA
- SSL: Let's Encrypt, RSA 2048, expires Jan 2027
- Common Crawl link graph: rank 1,887,012, 9 hosts
- Verified with: Apple Business, Google, Microsoft 365, OpenAI
DNS records as swept Nov 2026, certificate as seen Nov 2026, registration from the registry's RDAP service. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| thermocalc.com | 14 |
| www.thermocalc.com | 12 |
Full technology history →
Report an incorrect detection
Recent changes
- dropped Nginx Oct 2026
- detected Cloudflare Aug 2026
- dropped HSTS Aug 2026
- detected Nginx Jul 2026