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Domain report

java-users.jp

java-users.jp ranks in the top 0.044% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 15 distinct hosts observed under it.

Explore java-users.jp in the Web Graph

Connectivity

#58,498harmonic-centrality rank
Top percentile
0.044%
Hosts observed
15

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://java-users.jp/ answered with HTTP 200.

DNS records

A
  • 18.155.75.62
  • 18.155.75.68
  • 18.155.75.128
  • 18.155.75.88
AAAA
No records found.
MX
No records found.
NS
  • ns-111.awsdns-13.com.
  • ns-1275.awsdns-31.org.
  • ns-1648.awsdns-14.co.uk.
  • ns-817.awsdns-38.net.

Live preview

This is a live, sandboxed embed of java-users.jp — 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
public, max-age=0, s-maxage=31536000
Content-Encoding
Not sent

Security

Content-Security-Policy
Not sent
Strict-Transport-Security
Not sent
X-Frame-Options
Not sent
X-Content-Type-Options
Not sent
Referrer-Policy
Not sent
Permissions-Policy
Not sent

What each security header does

Redirect chain

  1. 1.http://java-users.jp/HTTP 301

    → https://java-users.jp/

  2. 2.https://java-users.jp/HTTP 302

    → https://www.java-users.jp/

  3. 3.https://www.java-users.jp/HTTP 200

Meta tags

Title
日本Javaユーザーグループ - 日本Javaユーザーグループ
Description
Not set
Canonical
Not set
Robots
Not set
Generator
Hugo 0.75.1
Open Graph title
日本Javaユーザーグループ
Open Graph description
Not set
Open Graph image
https://www.java-users.jp/img/kimono-duke.png
Open Graph type
website
Twitter card
summary
Twitter title
日本Javaユーザーグループ
Twitter image
https://www.java-users.jp/img/kimono-duke.png

robots.txt

java-users.jp has no robots.txt.

Technology detected

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

  • Cloudflarecdn

    Server: cloudflare

  • Hugoframework

    <meta name="generator"> = "Hugo 0.75.1"

Related domains

Similar connectivity

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