What powers yoonholee.com?
Last seen Sep 2026 · 7 technologies across 6 categories
Analytics
Caching
CDN
Miscellaneous
PaaS
Performance
AI Crawlers
Restricts 10 of 33 AI crawlers we track by name in its robots.txt. Checked Oct 2026.
Training crawlers
- CCBot Restricted
- ClaudeBot Restricted
- GPTBot Restricted
Search and AI assistants
- Applebot Restricted
- Claude-SearchBot Restricted
- OAI-SearchBot Restricted
- PerplexityBot Restricted
User-request fetchers
- ChatGPT-User Restricted
- Claude-User Restricted
- Perplexity-User Restricted
The other 23 AI crawlers we track are not mentioned and only inherit the catch-all rules that apply to every crawler.
- robots.txt found
- llms.txt found
- ai.txt not found
- Oct 2026 claude-searchbot: Restricted (was Allowed)
- Oct 2026 claude-user: Restricted (was Allowed)
- Oct 2026 chatgpt-user: Restricted (was Allowed)
- Oct 2026 perplexitybot: Restricted (was Allowed)
- Oct 2026 applebot: Restricted (was Allowed)
- Oct 2026 ccbot: Restricted (was Allowed)
AI Crawlers
10 of 33 AI crawlers restricted
Standards: llms.txt
Audience
- 100% desktop
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.53 / 10 · ranked #2,435,727 of all domains
22 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.8 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Sep 2026.
Infrastructure
- Hosted on Fastly (185.199.108.153, IPv6)
- DNS: Google Cloud DNS
- Email: no MX record returned
- Email security: DNSSEC signed
- SSL: Let's Encrypt, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 2,030,700, 2 hosts
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Full technology history →
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Recent changes
- dropped Bootstrap Jul 2026
- dropped jsDelivr Jul 2026
- detected RSS Jul 2026
- dropped Chart.js Apr 2026
- dropped core-js Apr 2026
- dropped Google Font API Apr 2026
- dropped jQuery Apr 2026
- dropped MathJax Apr 2026
- dropped MDBootstrap Apr 2026
- dropped Polyfill Apr 2026