What powers castbmc.app?
Last seen Oct 2026 · 7 technologies across 6 categories
CDN
cdnjs
since Oct 2023
Cloudflare
since Oct 2023
JavaScript libraries
Modernizr
since Oct 2023
Miscellaneous
PWA
since Oct 2023
Programming languages
Python
since Oct 2023
Security
HSTS
since Oct 2023
Web frameworks
Django
since Oct 2023
AI Crawlers
Blocks all crawlers by default in robots.txt (User-agent: *). Checked Oct 2026.
- robots.txt found
- llms.txt not checked
- ai.txt not checked
AI Crawlers
All crawlers blocked
Audience
- 77% phone
- 23% desktop
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
1.29 / 10 · ranked #8,808,734 of all domains
6 referring domains · OpenPageRank
Search traffic
110 est. monthly organic visits (US)
9 keywords in Google's top 30
Core Web Vitals
| LCP | 1.9 s |
| INP | 100 ms |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English
- CDN: Google
- Weight: 0.5 MB · 11 requests
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on Google Cloud (35.184.130.254)
- DNS: Google Cloud DNS
- Email: postmarkapp.com
- Email security: no SPF record, no DMARC record, DNSSEC signed
- SSL: Let's Encrypt, RSA 2048, expires Jan 2027
- Common Crawl link graph: rank 24,557,096
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted