What technology does diadema.cz use?

diadema.cz is built with Bootstrap.

Is diadema.cz secure (HTTPS)?

Yes. diadema.cz uses TLS 1.2 with a certificate issued by Let's Encrypt, valid until Oct 19, 2026.

Who hosts diadema.cz?

diadema.cz is hosted on VODAFONE-CZ-AS - Vodafone Czech Republic a.s., CZ.

What is diadema.cz's SEO score?

diadema.cz scored 65/100 for SEO in the latest analysis (fair).

What is diadema.cz's overall website score?

diadema.cz has an overall SiteGraph score of 83/100, combining SEO, performance, security, and accessibility.

diadema.cz

Diadema Internet

Last scanned Jul 26, 2026, 12:49 PM · 9 views

Overall score

Great

Summary

This website uses Bootstrap hosted on VODAFONE-CZ-AS - Vodafone Czech Republic a.s., CZ. SEO is fair (65/100) and accessibility is excellent (100/100). Security scores good (75/100) and performance excellent (100/100). Top issue: Missing meta description.

Hosted on VODAFONE-CZ-AS - Vodafone Czech Republic a.s., CZ

Top issues to fix

8 issues found · 2 high priority

Missing Content-Security-Policy header
Security
Add a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing meta description
SEO
Add a ~150-character meta description to control your search-result snippet and lift click-through rate.
Missing X-Content-Type-Options header
Security
Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
Security
Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
Missing canonical link
SEO
Add <link rel="canonical"> so search engines know which URL variant to index.
No structured data (JSON-LD) found
SEO
Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.

+2 more issues — details in the sections below.

SEO

5 issue(s) found

100

Performance

515 ms

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Technologies

Detected frameworks, languages, and tools.

Bootstrap

Hosting & CDN

Hosting provider: VODAFONE-CZ-AS - Vodafone Czech Republic a.s., CZ
CDN provider: —
IP address: 188.94.232.14
ASN: AS16019 (VODAFONE-CZ-AS - Vodafone Czech Republic a.s., CZ)

DNS records

Type	Value
A	188.94.232.14
AAAA	2a02:8304:e:1::2
MX	—
TXT	—
NS	—
CAA	—
CNAME	www.inazure.diadema.cz
IPv6 support	Yes

TLS / SSL certificate

Version: TLS 1.2
Issuer: Let's Encrypt
Subject: diadema.cz
Valid from: Jul 21, 2026
Valid to: Oct 19, 2026
Days until expiry: 82
SAN domains: diadema.cz, internet-plasy.cz, internet.diadema.cz, internet.plasy.cz, www.diadema.cz, www.internet-plasy.cz, www.internet.diadema.cz, www.internet.plasy.cz

Security headers

Strict-Transport-SecurityEnabled
Content-Security-PolicyMissing
X-Frame-OptionsMissing
X-Content-Type-OptionsMissing
Referrer-PolicyMissing
Permissions-PolicyMissing

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 1 · H2 9 · H3 11

Links

10 internal · 2 external · 0 broken

Images

2 total · 0 missing alt

Scripts / Styles

5 scripts · 2 stylesheets

JS / CSS size

2.3 KB · 0 B

Page size

31.4 KB

Robots.txt & Sitemap

robots.txt: Found
Disallow rules: 3
sitemap.xml: Not found
URLs in sitemap: 0

SEO issues

Missing meta description
Missing canonical link
No structured data (JSON-LD) found
Missing OpenGraph tags
sitemap.xml not found

Scan details

Requested URL: https://diadema.cz
Final URL: https://www.diadema.cz/
HTTP status: 200
HTTP version: HTTP/2
Response time: 515 ms
HTML size: 31.4 KB
Redirect chain: https://diadema.cz → https://www.diadema.cz/

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does diadema.cz use?: diadema.cz is built with Bootstrap.
Is diadema.cz secure (HTTPS)?: Yes. diadema.cz uses TLS 1.2 with a certificate issued by Let's Encrypt, valid until Oct 19, 2026.
Who hosts diadema.cz?: diadema.cz is hosted on VODAFONE-CZ-AS - Vodafone Czech Republic a.s., CZ.
What is diadema.cz's SEO score?: diadema.cz scored 65/100 for SEO in the latest analysis (fair).
What is diadema.cz's overall website score?: diadema.cz has an overall SiteGraph score of 83/100, combining SEO, performance, security, and accessibility.