What powers 
erefdn.org?
Last seen Sep 2026 · 45 technologies across 21 categories
Analytics
CDN
CMS
Databases
Ecommerce
Font scripts
JavaScript libraries
Maps
Miscellaneous
PaaS
Page builders
Payment processors
Programming languages
Security
Tag managers
UI frameworks
Video players
Web servers
Webmail
WordPress plugins
WordPress themes
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 found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Standards: llms.txt
Audience
- 87% desktop
- 13% phone
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.75 / 10 · ranked #278,127 of all domains
152 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.5 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 1100 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English (United States)
- CDN: Cloudflare
- Weight: 3.1 MB · 68 requests
- WordPress theme: sage · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Environmental Research & Education Foundation (Environmental Research and Education Foundation on Wikidata)
- Founded: 1992
- Country: United States
- Profiles: Facebook, X, LinkedIn, YouTube
From the homepage's own structured data (Sep 2026) and Wikidata (CC0).
Infrastructure
- Hosted on Cloudflare (162.159.135.42)
- DNS: Network Solutions
- Email: Proofpoint Essentials
- Email security: SPF (hard fail), DMARC monitor only
- SSL: Google Trust Services, ECDSA P256, wildcard, expires Oct 2026
- Common Crawl link graph: rank 1,929,293, 4 hosts
- Verified with: Microsoft 365
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.erefdn.org | 29 |
| erefdn.org | 26 |
| reports.erefdn.org | 22 |
Full technology history →
Report an incorrect detection
Recent changes
- dropped Priority Hints May 2026
- detected Twitter Emoji (Twemoji) Mar 2026