Domain report
jonbergmann.com
jonbergmann.com ranks in the top 0.33% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 2 distinct hosts observed under it.
Connectivity
- Top percentile
- 0.33%
- Hosts observed
- 2
From the Common Crawl cc-main-2026-jul-aug-sep hyperlink graph, 133,241,980 domains total. What this rank means
HTTPS reachability
https://jonbergmann.com/ answered with HTTP 200.
DNS records
- A
- 104.21.20.199
- 172.67.194.31
- AAAA
- 2606:4700:3035::6815:14c7
- 2606:4700:3036::ac43:c21f
- MX
- 1 aspmx.l.google.com.
- 10 alt3.aspmx.l.google.com.
- 10 alt4.aspmx.l.google.com.
- 5 alt1.aspmx.l.google.com.
- 5 alt2.aspmx.l.google.com.
- NS
- jermaine.ns.cloudflare.com.
- joyce.ns.cloudflare.com.
Live preview
This site sends "X-Frame-Options: ALLOW-FROM https://app.kajabi.com https://app.vibely.io https://communities.kajabi.com https://communities-widget.kajabi.com *.mykajabi.com https://communities.newkajabi-staging.com https://communities-widget.newkajabi-staging.com https://www.jonbergmann.com", which blocks embedding it here.
Since jonbergmann.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; charset=utf-8
- Cache-Control
- max-age=0, private, must-revalidate, no-cache, no-store
- Content-Encoding
- Not sent
Security
- Content-Security-Policy
- frame-ancestors 'self' https://app.kajabi.com https://app.vibely.io https://communities.kajabi.com https://communities-widget.kajabi.com *.mykajabi.com https://communities.newkajabi-staging.com https://communities-widget.newkajabi-staging.com https://www.jonbergmann.com
- Strict-Transport-Security
- Not sent
- X-Frame-Options
- ALLOW-FROM https://app.kajabi.com https://app.vibely.io https://communities.kajabi.com https://communities-widget.kajabi.com *.mykajabi.com https://communities.newkajabi-staging.com https://communities-widget.newkajabi-staging.com https://www.jonbergmann.com
- X-Content-Type-Options
- nosniff
- Referrer-Policy
- strict-origin-when-cross-origin
- Permissions-Policy
- Not sent
Redirect chain
- 1.
http://jonbergmann.com/HTTP 301→ https://www.jonbergmann.com/
- 2.
https://www.jonbergmann.com/HTTP 200
Meta tags
- Title
- Jon Bergmann | Flipped Classroom & Teaching in the Age of AI
- Description
- 32 years teaching high school science. I flipped the classroom in 2007 and I'm rebuilding it for the age of AI. Free guides for teachers and school leaders.
- Canonical
- https://www.jonbergmann.com
- Robots
- Not set
- Generator
- Not set
- Open Graph title
- Jon Bergmann | Flipped Classroom & Teaching in the Age of AI
- Open Graph description
- 32 years teaching high school science. I flipped the classroom in 2007 and I'm rebuilding it for the age of AI. Free guides for teachers and school leaders.
- Open Graph image
- https://kajabi-storefronts-production.kajabi-cdn.com/kajabi-storefronts-production/sites/177787/images/8pJ31J3QVSPtXwtpxxQw_file.jpg
- Open Graph type
- website
- Twitter card
- summary_large_image
- Twitter title
- Jon Bergmann | Flipped Classroom & Teaching in the Age of AI
- Twitter image
- https://kajabi-storefronts-production.kajabi-cdn.com/kajabi-storefronts-production/sites/177787/images/8pJ31J3QVSPtXwtpxxQw_file.jpg
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
- Cloudflare Bot Managementcdn
Cookie set: __cf_bm
Related domains
Similar connectivity
Domains ranked just above and below it in the same snapshot.