Domain report
flatworldknowledge.com
flatworldknowledge.com ranks in the top 0.30% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 19 distinct hosts observed under it.
Connectivity
- Top percentile
- 0.30%
- Hosts observed
- 19
From the Common Crawl cc-main-2026-jul-aug-sep hyperlink graph, 133,241,980 domains total. What this rank means
HTTPS reachability
https://flatworldknowledge.com/ answered with HTTP 200.
DNS records
- A
- 108.156.184.82
- 108.156.184.103
- 108.156.184.26
- 108.156.184.62
- AAAA
- 2600:9000:24fd:aa00:f:dc9:d440:93a1
- 2600:9000:24fd:3c00:f:dc9:d440:93a1
- 2600:9000:24fd:6400:f:dc9:d440:93a1
- 2600:9000:24fd:3200:f:dc9:d440:93a1
- 2600:9000:24fd:2a00:f:dc9:d440:93a1
- 2600:9000:24fd:7400:f:dc9:d440:93a1
- 2600:9000:24fd:e200:f:dc9:d440:93a1
- 2600:9000:24fd:6e00:f:dc9:d440:93a1
- MX
- 10 aspmx.l.google.com.
- 20 alt1.aspmx.l.google.com.
- 30 alt2.aspmx.l.google.com.
- 40 aspmx2.googlemail.com.
- 50 aspmx3.googlemail.com.
- NS
- ns-1224.awsdns-25.org.
- ns-1941.awsdns-50.co.uk.
- ns-459.awsdns-57.com.
- ns-843.awsdns-41.net.
Live preview
This site sends "X-Frame-Options: SAMEORIGIN", which blocks embedding it here.
Since flatworldknowledge.com can't be embedded live, this is a captured screenshot instead — a snapshot from whenever it was last rendered, not necessarily this exact moment.
Domain registration (WHOIS / RDAP)
RDAP lookup failed (HTTP 429).
SSL certificate
Certificate Transparency lookup failed (HTTP 429).
HTTP & security headers
Response
- Server
- cloudflare
- Content-Type
- text/html
- Cache-Control
- public, max-age=0, must-revalidate
- Content-Encoding
- Not sent
Security
- Content-Security-Policy
- Not sent
- Strict-Transport-Security
- max-age=63072000; includeSubDomains
- X-Frame-Options
- SAMEORIGIN
- X-Content-Type-Options
- nosniff
- Referrer-Policy
- strict-origin-when-cross-origin
- Permissions-Policy
- camera=(), microphone=(), geolocation=(), payment=(), usb=(), fullscreen=(self "https://player.vimeo.com"), autoplay=(self "https://player.vimeo.com"), picture-in-picture=(self "https://player.vimeo.com"), clipboard-write=(self)
Redirect chain
- 1.
http://flatworldknowledge.com/HTTP 301→ https://flatworldknowledge.com/
- 2.
https://flatworldknowledge.com/HTTP 301→ http://catalog.flatworldknowledge.com/
- 3.
http://catalog.flatworldknowledge.com/HTTP 301→ https://catalog.flatworldknowledge.com/
- 4.
https://catalog.flatworldknowledge.com/HTTP 302→ https://catalog.flatworldknowledge.com/discover
- 5.
https://catalog.flatworldknowledge.com/discoverHTTP 301→ https://flatworld.com/
- 6.
https://flatworld.com/HTTP 200
Meta tags
- Title
- FlatWorld: Affordable Textbooks & Digital Course Materials
- Description
- Trusted by 2,000+ institutions nationwide: homework, podcasts, and AI study support built into one easy-to-use platform at a price that respects your students.
- Canonical
- https://flatworld.com/
- Robots
- index, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1
- Generator
- Not set
- Open Graph title
- FlatWorld: Affordable Textbooks & Digital Course Materials
- Open Graph description
- Trusted by 2,000+ institutions nationwide: homework, podcasts, and AI study support built into one easy-to-use platform at a price that respects your students.
- Open Graph image
- https://flatworld.com/_astro/chalkboard-explanation.B18mC9cH.webp
- Open Graph type
- website
- Twitter card
- summary_large_image
- Twitter title
- FlatWorld: Affordable Textbooks & Digital Course Materials
- Twitter image
- https://flatworld.com/_astro/chalkboard-explanation.B18mC9cH.webp
robots.txt
- Disallow rules (User-agent: *)
- 2
- 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.