dan.org
Home - Divers Alert Network
Last scanned Aug 24, 2026, 1:22 PM
Overall score
Great
Summary
DAN promotes diver safety worldwide through research, medicine, education & emergency support. This website uses WordPress. SEO is excellent (90/100) and accessibility is excellent (100/100). Security scores fair (65/100) and performance fair (70/100). Top issue: robots.txt not found.
DAN promotes diver safety worldwide through research, medicine, education & emergency support. Get answers: What should divers do for their own safety?
Top issues to fix
7 issues found · 2 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
robots.txt not found
SEOPublish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEOPublish an XML sitemap and reference it from robots.txt to speed up page discovery.
+1 more issue — details in the sections below.
SEO
2 issue(s) found
Performance
245 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
DAN promotes diver safety worldwide through research, medicine, education & emergency support. Get answers: What should divers do for their own safety?
Meta tags
- Title
- Home - Divers Alert Network
- Description
- DAN promotes diver safety worldwide through research, medicine, education & emergency support. Get answers: What should divers do for their own safety?
- Canonical
- https://dan.org/
- Language
- en-US
- Charset
- UTF-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- index, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- —
- IP address
- —
- ASN
- —
DNS records
| Type | Value |
|---|---|
| A | — |
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Let's Encrypt
- Subject
- dan.org
- Valid from
- Jul 15, 2026
- Valid to
- Oct 13, 2026
- Days until expiry
- 49
- SAN domains
- dan.org, www.dan.org
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyEnabled
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 1 · H2 10 · H3 10
Links
74 internal · 14 external · 13 broken
Images
103 total · 0 missing alt
Scripts / Styles
53 scripts · 31 stylesheets
JS / CSS size
224 KB · 396 KB
Page size
456 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- robots.txt not found
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://dan.org
- Final URL
- https://dan.org
- HTTP status
- 200
- HTTP version
- HTTP/1.1
- Response time
- 236 ms
- HTML size
- 456 KB
- Redirect chain
- https://dan.org
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does dan.org use?
- dan.org is built with WordPress, WooCommerce, jQuery, Google Analytics, Apache.
- Is dan.org secure (HTTPS)?
- Yes. dan.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 13, 2026.
- Who hosts dan.org?
- Hosting provider information for dan.org is not available yet.
- What is dan.org's SEO score?
- dan.org scored 90/100 for SEO in the latest analysis (excellent).
- What is dan.org's overall website score?
- dan.org has an overall SiteGraph score of 81/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card