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Domain report

ef.org

ef.org ranks in the top 0.35% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 4 distinct hosts observed under it.

Explore ef.org in the Web Graph

Connectivity

#471,331harmonic-centrality rank
Top percentile
0.35%
Hosts observed
4

From the Common Crawl cc-main-2026-jul-aug-sep hyperlink graph, 133,241,980 domains total. What this rank means

HTTPS reachability

200HTTP status

https://ef.org/ answered with HTTP 200.

DNS records

A
  • 104.198.104.86
AAAA
No records found.
MX
  • 10 ef-org.mail.protection.outlook.com.
NS
  • dns3.easydns.org.
  • dns2.easydns.net.
  • dns1.easydns.com.

Live preview

Screenshot of ef.org

This site sends "X-Frame-Options: sameorigin", which blocks embedding it here.

Since ef.org can't be embedded live, this is a captured screenshot instead — a snapshot from whenever it was last rendered, not necessarily this exact moment.

Domain registration (WHOIS / RDAP)

RDAP lookup failed (HTTP 429).

How to read WHOIS and RDAP data

SSL certificate

Certificate Transparency lookup failed (HTTP 429).

How to check when a certificate expires

HTTP & security headers

Response

Server
cloudflare
Content-Type
text/html; charset=UTF-8
Cache-Control
max-age=600, must-revalidate
Content-Encoding
Not sent

Security

Content-Security-Policy
default-src 'self' 'unsafe-inline' 'unsafe-eval' * data: blob:; img-src * data: blob:; frame-ancestors 'self';
Strict-Transport-Security
max-age=31536000; includeSubDomains
X-Frame-Options
sameorigin
X-Content-Type-Options
nosniff
Referrer-Policy
strict-origin-when-cross-origin
Permissions-Policy
camera=(), microphone=(), geolocation=(), payment=(self)

What each security header does

Redirect chain

  1. 1.http://ef.org/HTTP 301

    → http://www.ef.org/

  2. 2.http://www.ef.org/HTTP 301

    → https://www.ef.org/

  3. 3.https://www.ef.org/HTTP 200

Meta tags

Title
Homepage - U.S. Energy Foundation
Description
Energy Foundation helps build a strong, clean energy economy.
Canonical
https://www.ef.org/
Robots
index, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1
Generator
Site Kit by Google 1.189.0
Open Graph title
Energy Foundation
Open Graph description
Energy Foundation helps build a strong, clean energy economy.
Open Graph image
https://www.ef.org/wp-content/uploads/default-opengraph-image-us-energy-foundation.jpg
Open Graph type
website
Twitter card
summary_large_image
Twitter title
Energy Foundation
Twitter image
https://www.ef.org/wp-content/uploads/twitter.png

robots.txt

Disallow rules (User-agent: *)
0
Disallow rules (other agents)
0

Sitemap declared:

  • https://www.ef.org/sitemap_index.xml

Technology detected

Best-effort, based on a small set of well-known signals — this may be incomplete.

  • Cloudflarecdn

    Server: cloudflare

  • WordPresscms

    Found "wp-content/" in the page's HTML

  • Google Tag Manageranalytics

    Found "googletagmanager.com/gtm.js" in the page's HTML

Related domains

Similar connectivity

Domains ranked just above and below it in the same snapshot.