What powers cdmhub.org?
Last seen May 2026 · 18 technologies across 10 categories
Analytics
Google Analytics
since Dec 2023
JavaScript frameworks
JavaScript libraries
Message boards
Miscellaneous
Operating systems
Ubuntu
since Jul 2025
Programming languages
Ruby
since Jul 2025
Security
HSTS
since Dec 2023
Web frameworks
Ruby on Rails
since Jul 2025
Web servers
Apache HTTP Server
since Dec 2023
AI Crawlers
Blocks 14 of 33 AI crawlers we track by name in its robots.txt. Checked Sep 2026.
Training crawlers
- Applebot-Extended Blocked
- Bytespider Blocked
- CCBot Blocked
- ClaudeBot Blocked
- cohere-training-data-crawler Blocked
- Diffbot Blocked
- FacebookBot Blocked
- Google-Extended Blocked
- GPTBot Blocked
- ImagesiftBot Blocked
- Webzio-Extended Blocked
Search and AI assistants
- Amazonbot Blocked
- OAI-SearchBot Blocked
- PerplexityBot Blocked
The other 19 AI crawlers we track are not mentioned and only inherit the catch-all rules that apply to every crawler.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
14 of 33 AI crawlers blocked
Open Page Rank
3.36 / 10 · ranked #1,049,792 of all domains
31 referring domains · OpenPageRank
Infrastructure
- Hosted on PURDUE-RESEARCH (128.211.145.96)
- DNS: purdue.edu
- Email: no MX record returned
- Email security: SPF (hard fail), DMARC
- SSL: Let's Encrypt, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 1,060,728, 3 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| community.cdmhub.org | 11 |
| cdmhub.org | 9 |