What powers wilhelmchang.com?
Last seen Sep 2026 · 60 technologies across 25 categories
Analytics
Authentication
CDN
CMS
Comment systems
Databases
Development
Font scripts
Issue trackers
JavaScript frameworks
JavaScript libraries
Maps
Miscellaneous
PaaS
Performance
Photo galleries
Programming languages
Security
Tag managers
UI frameworks
Web frameworks
Web servers
Widgets
WordPress plugins
WordPress themes
AI Crawlers
Restricts 9 of 33 AI crawlers we track by name in its robots.txt. Checked Oct 2026.
Training crawlers
- Applebot-Extended Restricted
- Bytespider Restricted
- CCBot Restricted
- ClaudeBot Restricted
- Google-Extended Restricted
- GPTBot Restricted
Search and AI assistants
- Amazonbot Restricted
- OAI-SearchBot Restricted
- PerplexityBot Restricted
The other 24 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
- llms-full.txt found
- ai.txt not found
Content Signals:
search=yes ai-train=yes ai-input=yes declared in robots.txt
- Oct 2026 oai-searchbot added to robots.txt
- Oct 2026 Content Signals changed
- Oct 2026 applebot-extended added to robots.txt
- Oct 2026 anthropic-ai added to robots.txt
- Oct 2026 bytespider added to robots.txt
- Oct 2026 amazonbot added to robots.txt
AI Crawlers
9 of 33 AI crawlers restricted
Standards: llms.txt, llms-full.txt, Content Signals
Audience
- 52% phone
- 48% desktop
Taiwan
United Kingdom
France
Hong Kong SAR China
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.07 / 10 · ranked #3,395,817 of all domains
9 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.6 s |
| INP | 50 ms |
| CLS | 0.2 |
| TTFB | 700 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English (United States)
- CDN: Cloudflare
- Weight: 4.8 MB · 112 requests
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on Cloudflare (104.21.39.88, IPv6)
- DNS: Cloudflare DNS
- Email: Rackspace Email
- Email security: no SPF record, DMARC monitor only
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 250,104, 3 hosts
- Verified with: Meta Business
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.wilhelmchang.com | 34 |
| academy.wilhelmchang.com | 26 |
| photo.wilhelmchang.com | 14 |
Full technology history →
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Recent changes
- dropped styled-components Feb 2026
- detected Cloudflare Browser Insights Nov 2025