astro.cz
Last scanned Jul 27, 2026, 12:43 PM
Overall score
Fair
Summary
This website uses Apache hosted on CESNET2 - CESNET z.s.p.o., CZ. SEO is poor (45/100) and accessibility is good (85/100). Security scores poor (25/100) and performance excellent (100/100). Top issue: Missing <title>.
- CZ
- Hosted on CESNET2 - CESNET z.s.p.o., CZ
Top issues to fix
13 issues found · 5 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 title tag
SEOAdd a unique, descriptive <title> tag — it's the single most important on-page SEO element.
Missing meta description
SEOAdd a ~150-character meta description to control your search-result snippet and lift click-through rate.
Missing viewport meta tag
AccessibilityAdd <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
+7 more issues — details in the sections below.
SEO
7 issue(s) found
Performance
796 ms
Security
HTTPS & header checks
Accessibility
2 issue(s) found
Meta tags
- Title
- Description
- Canonical
- Language
- Charset
- Viewport
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- CESNET2 - CESNET z.s.p.o., CZ
- CDN provider
- —
- IP address
- 147.231.104.19
- ASN
- AS2852 (CESNET2 - CESNET z.s.p.o., CZ)
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
- europa.astro.cz
- Valid from
- Jun 15, 2026
- Valid to
- Sep 13, 2026
- Days until expiry
- 48
- SAN domains
- dev.astro.cz, europa.astro.cz, webmail.astro.cz, www.astro.cz
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: none · 0 cookie(s) observed
Content & assets
Headings
H1 1 · H2 0 · H3 0
Links
0 internal · 0 external · 0 broken
Images
0 total · 0 missing alt
Scripts / Styles
0 scripts · 0 stylesheets
JS / CSS size
0 B · 0 B
Page size
45 B
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing <title>
- Missing meta description
- Missing canonical link
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- robots.txt not found
- sitemap.xml not found
Accessibility issues
- Missing <html lang> attribute
- Missing viewport meta tag
Scan details
- Requested URL
- https://astro.cz
- Final URL
- https://astro.cz
- HTTP status
- 200
- HTTP version
- HTTP/1.1
- Response time
- 796 ms
- HTML size
- 45 B
- Redirect chain
- https://astro.cz
See something wrong on this report? Request a correction
Related websites
Same technology stack
lucerna-chem.ch
Lucerna-Chem AG
rebounce.ai
rebounce.ai | AI-based Bounce Management for E-Commerce
ebi.ac.uk
EMBL-EBI homepage | EMBL-EBI
uwplatt.edu
University of Wisconsin-Platteville | College in Wisconsin
dgb.de
Deutscher Gewerkschaftsbund | DGB
voicemod.net
Free Real Time Voice Changer for PC & Mac | Voicemod
Same hosting provider
nette.org
Nette – Comfortable and Safe Web Development in PHP
texy.info
Texy – human friendy markup for PHP
zcu.cz
Západočeská univerzita v Plzni
vse.cz
Vysoká škola ekonomická v Praze
muni.cz
Masarykova univerzita | MUNI
fzu.cz
Fyzikální ústav Akademie věd České republiky | FZU
Frequently asked questions
- What technology does astro.cz use?
- astro.cz is built with Apache.
- Is astro.cz secure (HTTPS)?
- Yes. astro.cz uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 13, 2026.
- Who hosts astro.cz?
- astro.cz is hosted on CESNET2 - CESNET z.s.p.o., CZ.
- What is astro.cz's SEO score?
- astro.cz scored 45/100 for SEO in the latest analysis (poor).
- What is astro.cz's overall website score?
- astro.cz has an overall SiteGraph score of 62/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card