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Domain report

ef.com

ef.com ranks in the top 0.0070% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 118 distinct hosts observed under it.

Explore ef.com in the Web Graph

Connectivity

#9,327harmonic-centrality rank
Top percentile
0.0070%
Hosts observed
118

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.com/ answered with HTTP 200.

DNS records

A
  • 104.18.43.76
  • 172.64.144.180
AAAA
  • 2a06:98c1:310d::6812:2b4c
  • 2a06:98c1:3103::ac40:90b4
MX
  • 0 efcom.mail.protection.outlook.com.
NS
  • jihoon.ns.cloudflare.com.
  • tricia.ns.cloudflare.com.

Live preview

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

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
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.com/HTTP 301

    → https://ef.com/

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

    → https://www.ef.com/

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

Meta tags

Title
EF: Choose Location
Description
Choose your Location to access your local EF website.
Canonical
https://www.ef.com/
Robots
Not set
Generator
Not set
Open Graph title
EF: Choose Location
Open Graph description
Choose your Location to access your local EF website.
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: Choose Location
Twitter image
Not set

robots.txt

Disallow rules (User-agent: *)
13
Disallow rules (other agents)
1

Sitemap declared:

  • https://www.ef.com/sitemap-index.xml

Technology detected

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

  • Cloudflarecdn

    Server: cloudflare

  • Next.jsframework

    Found "_next/static/" in the page's HTML

  • Cloudflare Bot Managementcdn

    Cookie set: __cf_bm

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Similar connectivity

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