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secappdev.org

secappdev.org ranks in the top 0.41% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 3 distinct hosts observed under it.

Explore secappdev.org in the Web Graph

Connectivity

#549,063harmonic-centrality rank
Top percentile
0.41%
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://secappdev.org/ answered with HTTP 200.

DNS records

A
  • 98.84.224.111
  • 18.208.88.157
AAAA
  • 2600:1f18:16e:df01::259
  • 2600:1f18:16e:df01::258
MX
  • 1 aspmx.l.google.com.
  • 10 aspmx2.googlemail.com.
  • 10 aspmx3.googlemail.com.
  • 10 aspmx4.googlemail.com.
  • 10 aspmx5.googlemail.com.
  • 20 backup.mx.bytemark.co.uk.
NS
  • asa.ns.cloudflare.com.
  • kevin.ns.cloudflare.com.

Live preview

This is a live, sandboxed embed of secappdev.org — 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
public,max-age=0,must-revalidate
Content-Encoding
Not sent

Security

Content-Security-Policy
Not sent
Strict-Transport-Security
max-age=31536000
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://secappdev.org/HTTP 301

    → https://secappdev.org/

  2. 2.https://secappdev.org/HTTP 200

Meta tags

Title
SecAppDev 2026
Description
SecAppDev is an intensive one-week course in secure application development. In-depth lectures and hands-on workshops take you on a deep-dive in today's security best practices.
Canonical
Not set
Robots
Not set
Generator
Not set
Open Graph title
Not set
Open Graph description
Not set
Open Graph image
Not set
Open Graph type
Not set
Twitter card
summary_large_image
Twitter title
SecAppDev 2026
Twitter image
https://secappdev.org/images/logo_secappdev.png

robots.txt

secappdev.org has no robots.txt.

Technology detected

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

  • Cloudflarecdn

    Server: cloudflare

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