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Domain report

physicsclassroom.com

physicsclassroom.com ranks in the top 0.010% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 4 distinct hosts observed under it.

Explore physicsclassroom.com in the Web Graph

Connectivity

#13,945harmonic-centrality rank
Top percentile
0.010%
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://physicsclassroom.com/ answered with HTTP 200.

DNS records

A
  • 104.26.7.124
  • 172.67.69.137
  • 104.26.6.124
AAAA
  • 2606:4700:20::681a:67c
  • 2606:4700:20::ac43:4589
  • 2606:4700:20::681a:77c
MX
  • 0 physicsclassroom-com.mail.protection.outlook.com.
NS
  • jeff.ns.cloudflare.com.
  • olga.ns.cloudflare.com.

Live preview

This is a live, sandboxed embed of physicsclassroom.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
no-cache
Content-Encoding
Not sent

Security

Content-Security-Policy
Not sent
Strict-Transport-Security
max-age=2592000
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://physicsclassroom.com/HTTP 301

    → https://physicsclassroom.com/

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

    → https://www.physicsclassroom.com/

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

Meta tags

Title
The Physics Classroom
Description
The Physics Classroom serves students, teachers and classrooms by providing classroom-ready resources that utilize an easy-to-understand language that makes learning interactive and multi-dimensional. Written by teachers for teachers and students, The Physics Classroom provides a wealth of resources that meets the varied needs of both students and teachers.
Canonical
https://www.physicsclassroom.com/
Robots
Not set
Generator
Not set
Open Graph title
The Physics Classroom
Open Graph description
The Physics Classroom serves students, teachers and classrooms by providing classroom-ready resources that utilize an easy-to-understand language that makes learning interactive and multi-dimensional. Written by teachers for teachers and students, The Physics Classroom provides a wealth of resources that meets the varied needs of both students and teachers.
Open Graph image
https://www.physicsclassroom.com/getcontentasset/17b63fa5-6dc3-4fbb-baa3-9b38e25722d3/a28a7e27-4593-40cf-8266-2ae4101723f5/yellow-icon.png.png?language=en
Open Graph type
Not set
Twitter card
Not set
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 Analyticsanalytics

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

Related domains

Similar connectivity

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