What powers underblue.com?
Last seen Sep 2026 · 33 technologies across 19 categories
Advertising
Affiliate programs
Analytics
Caching
CDN
CMS
Cookie compliance
Databases
JavaScript frameworks
JavaScript libraries
Miscellaneous
PaaS
Performance
Programming languages
Security
SEO
Tag managers
Webmail
WordPress plugins
AI Crawlers
Doesn't name any of the 33 AI crawlers we track in its robots.txt. Catch-all rules (User-agent: *) restrict some paths for every crawler, AI or not. Checked Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 55% desktop
- 45% phone
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
1.02 / 10 · ranked #12,158,492 of all domains
3 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.9 s |
| INP | 50 ms |
| CLS | 0.1 |
| TTFB | 1000 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English (United States)
- CDN: Cloudflare
- Weight: 7.4 MB · 87 requests
- WordPress theme: eaven · all themes
- Structured data: JSON-LD, Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
From the homepage's own structured data (Sep 2026).
Infrastructure
- Hosted on Cloudflare (104.21.76.217, IPv6)
- Email: Google Workspace
- Email security: SPF (hard fail), no DMARC record
- Common Crawl link graph: rank 11,867,574, 2 hosts
- Verified with: Google
DNS records as swept Aug 2026. How the web is hosted
Full technology history →
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Recent changes
- detected Criteo Aug 2026
- detected Google Publisher Tag Aug 2026
- detected reCAPTCHA Aug 2026
- detected Skimlinks Aug 2026
- detected Taboola Aug 2026
- dropped Google Font API Jun 2026
- detected Cloudflare Rocket Loader May 2026
- detected Google Analytics Apr 2026
- dropped Google Analytics Mar 2026
- detected CookieYes Jan 2026
- detected Microsoft Advertising Jan 2026