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Domain report

ef.edu

ef.edu ranks in the top 0.32% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 4 distinct hosts observed under it.

Explore ef.edu in the Web Graph

Connectivity

#429,625harmonic-centrality rank
Top percentile
0.32%
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.edu/ answered with HTTP 200.

DNS records

A
  • 104.18.10.139
  • 104.18.11.139
AAAA
  • 2606:4700::6812:b8b
  • 2606:4700::6812:a8b
MX
  • 0 ef-edu.mail.protection.outlook.com.
NS
  • anirban.ns.cloudflare.com.
  • pam.ns.cloudflare.com.
AS
Server in network CLOUDFLARENET, AS13335 · United States104.18.10.0/24, which holds 104.18.10.139

Live preview

This is a live, sandboxed embed of ef.edu — not a copy. What it shows can change any time the site itself does.

Domain registration (WHOIS / RDAP)

No RDAP (WHOIS) data is available for ef.edu.

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
Cache-Control
max-age=14400
Content-Encoding
Not sent

Security

Content-Security-Policy
Not sent
Strict-Transport-Security
max-age=7776000
X-Frame-Options
Not sent
X-Content-Type-Options
nosniff
Referrer-Policy
strict-origin-when-cross-origin
Permissions-Policy
Not sent

What each security header does

Redirect chain

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

    → https://ef.edu/

  2. 2.https://ef.edu/HTTP 301

    → https://www.ef.edu/

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

Meta tags

Title
EF - There's no limit to where you can go. | EF United States
Description
EF, world leader in international education since 1965. Offering educational tours, immersion language learning, cultural exchange and academic programs around the world. Whether you study abroad, learn a language at one of our language schools, host an exchange student or travel with your teacher or professor to exciting new destinations, our programs will expand your horizons, teach you new skills and show you the world.
Canonical
https://www.ef.edu/
Robots
NOYDIR,NOODP
Generator
Gatsby 3.15.0
Open Graph title
EF - There's no limit to where you can go. | EF United States
Open Graph description
EF, world leader in international education since 1965. Offering educational tours, immersion language learning, cultural exchange and academic programs around the world. Whether you study abroad, learn a language at one of our language schools, host an exchange student or travel with your teacher or professor to exciting new destinations, our programs will expand your horizons, teach you new skills and show you the world.
Open Graph image
https://a.storyblok.com/f/61891/2400x1260/bbb559ef2c/og-image-v3.png
Open Graph type
Not set
Twitter card
Not set
Twitter title
EF - There's no limit to where you can go. | EF United States
Twitter image
Not set

robots.txt

Disallow rules (User-agent: *)
12
Disallow rules (other agents)
1

Sitemap declared:

  • https://www.ef.edu/sitemap-index-us.xml

Technology detected

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

  • Cloudflarecdn

    Server: cloudflare

  • Gatsbyframework

    Found "/page-data/app-data.json" in the page's HTML

  • Cloudflare Bot Managementcdn

    Cookie set: __cf_bm

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Similar connectivity

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