What powers 
undergroundinfrastructure.com?
Last seen Oct 2026 · 27 technologies across 15 categories
Advertising
Analytics
CDN
Cookie compliance
Ecommerce
Font scripts
JavaScript frameworks
JavaScript libraries
Miscellaneous
Performance
Tag managers
UI frameworks
Video players
Webmail
AI Crawlers
Blocks 13 of 33 AI crawlers we track by name in its robots.txt. Checked Nov 2026.
Training crawlers
- Applebot-Extended Blocked
- Bytespider Blocked
- CCBot Blocked
- ClaudeBot Blocked
- cohere-training-data-crawler Blocked
- Diffbot Blocked
- Google-CloudVertexBot Blocked
- Google-Extended Blocked
- GoogleOther Blocked
- GPTBot Blocked
- meta-externalagent Blocked
Search and AI assistants
- Amazonbot Blocked
- PetalBot Blocked
The other 20 AI crawlers we track are not mentioned and stay allowed by default.
- robots.txt found
- llms.txt not found
- ai.txt not found
Content Signals:
search=yes ai-train=no declared in robots.txt
- Nov 2026 googleother added to robots.txt
- Nov 2026 bytespider added to robots.txt
- Nov 2026 ccbot added to robots.txt
- Nov 2026 claude-web added to robots.txt
- Nov 2026 applebot-extended added to robots.txt
- Nov 2026 robots.txt appeared
AI Crawlers
13 of 33 AI crawlers blocked
Standards: Content Signals
Audience
- 59% desktop
- 41% phone
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.78 / 10 · ranked #723,544 of all domains
78 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.7 s |
| INP | 50 ms |
| CLS | 0.1 |
| TTFB | 700 ms |
Real user p75, Chrome UX Report, Oct 2026.
Page
- CDN: Cloudflare
- Weight: 5.0 MB · 172 requests
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on Cloudflare (104.21.50.182, IPv6)
- DNS: Cloudflare DNS
- Email: Microsoft 365
- Email security: SPF (hard fail), DMARC monitor only
- SSL: Google Trust Services, ECDSA P256, wildcard, expires Dec 2026
- Common Crawl link graph: rank 7,025,315
- Verified with: Google
DNS records as swept Nov 2026, certificate as seen Nov 2026. How the web is hosted
Full technology history →
Report an incorrect detection
Recent changes
- dropped Cloudflare Browser Insights Sep 2026
- detected Priority Hints Sep 2026
- dropped GoDaddy Aug 2026
- dropped reCAPTCHA Aug 2026
- detected Cloudflare Browser Insights Jul 2026
- detected HTTP/3 Jul 2026