21.edu.ar
Universidad Siglo 21 | Siglo 21
Last scanned Jul 26, 2026, 5:47 AM
Overall score
Excellent
Summary
La universidad privada más elegida del país. This website uses Google Analytics hosted on Cloudflare behind Cloudflare CDN. SEO is good (80/100) and accessibility is excellent (100/100). Security scores good (85/100) and performance excellent (100/100). Top issue: Multiple H1 headings found.
La universidad privada más elegida del país. Inscripciones abiertas agosto 2026, descubrí nuestra oferta académica completa.
- United States
- Hosted on Cloudflare
Top issues to fix
5 issues found
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.
Multiple H1 headings found
SEOKeep a single H1 per page and demote the others to H2/H3.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
sitemap.xml not found
SEOPublish an XML sitemap and reference it from robots.txt to speed up page discovery.
SEO
3 issue(s) found
Performance
28 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
La universidad privada más elegida del país. Inscripciones abiertas agosto 2026, descubrí nuestra oferta académica completa.
Meta tags
- Title
- Universidad Siglo 21 | Siglo 21
- Description
- La universidad privada más elegida del país. Inscripciones abiertas agosto 2026, descubrí nuestra oferta académica completa.
- Canonical
- https://21.edu.ar
- Language
- es
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- Cloudflare
- CDN provider
- Cloudflare
- IP address
- 104.20.36.222
- ASN
- AS13335 (CLOUDFLARENET - Cloudflare, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX |
|
| TXT | — |
| NS |
|
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- GoDaddy.com, Inc.
- Subject
- *.21.edu.ar
- Valid from
- May 26, 2026
- Valid to
- Dec 10, 2026
- Days until expiry
- 134
- SAN domains
- *.21.edu.ar, 21.edu.ar
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyEnabled
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyEnabled
- Permissions-PolicyMissing
Compression: gzip · 2 cookie(s) observed
Content & assets
Headings
H1 2 · H2 10 · H3 8
Links
92 internal · 12 external · 0 broken
Images
34 total · 1 missing alt
Scripts / Styles
22 scripts · 5 stylesheets
JS / CSS size
542 KB · 283 KB
Page size
211 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 5
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Multiple H1 headings found
- No structured data (JSON-LD) found
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://21.edu.ar
- Final URL
- https://21.edu.ar
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 24 ms
- HTML size
- 211 KB
- Redirect chain
- https://21.edu.ar
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does 21.edu.ar use?
- 21.edu.ar is built with jQuery, Google Analytics, Meta Pixel.
- Is 21.edu.ar secure (HTTPS)?
- Yes. 21.edu.ar uses TLS 1.3 with a certificate issued by GoDaddy.com, Inc., valid until Dec 10, 2026.
- Who hosts 21.edu.ar?
- 21.edu.ar is hosted on Cloudflare, behind Cloudflare CDN.
- What is 21.edu.ar's SEO score?
- 21.edu.ar scored 80/100 for SEO in the latest analysis (great).
- What is 21.edu.ar's overall website score?
- 21.edu.ar has an overall SiteGraph score of 90/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card