zx2c4.com
ZX2C4
Last scanned Jul 25, 2026, 8:25 PM · 3 views
Overall score
Great
Summary
The portal for geek projects of Jason A. This website is hosted on AS-VULTR - The Constant Company, LLC, US. SEO is good (75/100) and accessibility is fair (65/100). Security scores excellent (90/100) and performance excellent (100/100). Top issue: Missing canonical link.
The portal for geek projects of Jason A. Donenfeld, also known as ZX2C4.
- United States
- Hosted on AS-VULTR - The Constant Company, LLC, US
Top issues to fix
7 issues found · 3 high priority
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Over half of images are missing alt text
AccessibilityAdd alt attributes to images — screen readers depend on them, and they help image SEO.
Missing viewport meta tag
AccessibilityAdd <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.
Missing canonical link
SEOAdd <link rel="canonical"> so search engines know which URL variant to index.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
Missing OpenGraph tags
SEOAdd og:title/og:description/og:image so shared links render a proper preview card.
+1 more issue — details in the sections below.
SEO
4 issue(s) found
Performance
253 ms
Security
HTTPS & header checks
Accessibility
2 issue(s) found
Organization
Company details published in this site's own structured data.
The portal for geek projects of Jason A. Donenfeld, also known as ZX2C4.
Contact
Email, phone, and address published on this site's own pages.
Source: https://www.zx2c4.com/contact
Meta tags
- Title
- ZX2C4
- Description
- The portal for geek projects of Jason A. Donenfeld, also known as ZX2C4.
- Canonical
- Language
- en
- Charset
- utf-8
- Viewport
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
No technologies detected.
Hosting & CDN
- Hosting provider
- AS-VULTR - The Constant Company, LLC, US
- CDN provider
- —
- IP address
- 192.248.189.215
- ASN
- AS20473 (AS-VULTR - The Constant Company, LLC, US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA |
|
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME |
|
| IPv6 support | Yes |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Let's Encrypt
- Subject
- www.zx2c4.com
- Valid from
- Jun 22, 2026
- Valid to
- Sep 20, 2026
- Days until expiry
- 56
- SAN domains
- www.zx2c4.com
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsEnabled
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 1 · H2 0 · H3 0
Links
1 internal · 3 external · 0 broken
Images
1 total · 1 missing alt
Scripts / Styles
2 scripts · 1 stylesheets
JS / CSS size
95.1 KB · 3.0 KB
Page size
1.9 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing canonical link
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- sitemap.xml not found
Accessibility issues
- Over half of images are missing alt text
- Missing viewport meta tag
Careers
This company has an active careers page, but individual openings weren't reliably parsed from it — visit the page above for current listings.
Scan details
- Requested URL
- https://zx2c4.com
- Final URL
- https://www.zx2c4.com/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 253 ms
- HTML size
- 1.9 KB
- Redirect chain
- https://zx2c4.com → https://www.zx2c4.com/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does zx2c4.com use?
- We did not detect any specific technologies for zx2c4.com in the latest scan.
- Is zx2c4.com secure (HTTPS)?
- Yes. zx2c4.com uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 20, 2026.
- Who hosts zx2c4.com?
- zx2c4.com is hosted on AS-VULTR - The Constant Company, LLC, US.
- What is zx2c4.com's SEO score?
- zx2c4.com scored 75/100 for SEO in the latest analysis (fair).
- What is zx2c4.com's overall website score?
- zx2c4.com has an overall SiteGraph score of 83/100, combining SEO, performance, security, and accessibility.
- Is zx2c4.com hiring?
- zx2c4.com has a careers page; check it directly for current openings.
OpenGraph & Twitter Card
OpenGraph
Twitter Card