What powers ef.do?
Last seen Oct 2026 · 30 technologies across 16 categories
A/B Testing
Advertising
Analytics
CDN
CMS
Cookie compliance
JavaScript frameworks
JavaScript libraries
Miscellaneous
PaaS
Performance
Programming languages
Reviews
Security
Tag managers
UI frameworks
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 Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 71% phone
- 29% desktop
Dominican Republic
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.09 / 10 · ranked #1,443,710 of all domains
44 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.7 s |
| INP | 350 ms |
| CLS | 0 |
| TTFB | 800 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Spanish (Dominican Republic)
- CDN: Amazon CloudFront, Cloudflare
- Weight: 2.5 MB · 133 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- EF
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on Cloudflare (104.18.10.139, IPv6)
- DNS: Cloudflare DNS
- Email: no MX record returned
- Email security: SPF (hard fail), DMARC reject
- SSL: Google Trust Services, ECDSA P256, expires Dec 2026
- Common Crawl link graph: rank 12,492,681
- Verified with: Google
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Full technology history →
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Recent changes
- detected Amazon Advertising Oct 2026
- dropped Gatsby Sep 2026
- dropped Preact Sep 2026
- detected Keen-Slider Aug 2026
- detected Next.js Aug 2026
- detected Node.js Aug 2026
- detected Priority Hints Aug 2026
- detected Microsoft Clarity Jul 2026
- detected Amazon S3 May 2026
- detected OneTrust Apr 2026
- detected Google Tag Manager Mar 2026