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Domain report

classzone.com

classzone.com ranks in the top 0.043% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 3 distinct hosts observed under it.

Explore classzone.com in the Web Graph

Connectivity

#57,719harmonic-centrality rank
Top percentile
0.043%
Hosts observed
3

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://classzone.com/ answered with HTTP 200.

DNS records

A
  • 52.3.186.210
  • 52.45.102.4
  • 100.26.166.11
AAAA
No records found.
MX
No records found.
NS
  • ns-1135.awsdns-13.org.
  • ns-1736.awsdns-25.co.uk.
  • ns-21.awsdns-02.com.
  • ns-659.awsdns-18.net.

Live preview

This is a live, sandboxed embed of classzone.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; charset=utf-8
Cache-Control
max-age=0
Content-Encoding
Not sent

Security

Content-Security-Policy
Not sent
Strict-Transport-Security
max-age=15768000; preload
X-Frame-Options
Not sent
X-Content-Type-Options
Not sent
Referrer-Policy
Not sent
Permissions-Policy
browsing-topics=()

What each security header does

Redirect chain

  1. 1.http://classzone.com/HTTP 301

    → https://classzone.com/

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

    → https://www.hmhco.com/classzone-retired

  3. 3.https://www.hmhco.com/classzone-retiredHTTP 200

Meta tags

Title
Classzone.com has been retired | HMH
Description
Canonical
https://www.hmhco.com/classzone-retired
Robots
index, follow
Generator
Not set
Open Graph title
Classzone.com has been retired | HMH
Open Graph description
Open Graph image
https://www.hmhco.com/default-seo-image.png
Open Graph type
website
Twitter card
summary_large_image
Twitter title
Not set
Twitter image
Not set

robots.txt

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

No Sitemap declared in robots.txt.

Technology detected

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

  • Cloudflarecdn

    Server: cloudflare

  • 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.