What technology does o2.cz use?

We did not detect any specific technologies for o2.cz in the latest scan.

Is o2.cz secure (HTTPS)?

Yes. o2.cz uses TLS 1.3 with a certificate issued by DigiCert Inc, valid until Sep 23, 2026.

Hosting provider information for o2.cz is not available yet.

What is o2.cz's SEO score?

o2.cz scored 90/100 for SEO in the latest analysis (excellent).

What is o2.cz's overall website score?

o2.cz has an overall SiteGraph score of 90/100, combining SEO, performance, security, and accessibility.

Has o2.cz's score changed over time?

o2.cz's overall score has declined by 3 points (from 93 to 90) since Jul 25, 2026.

o2.cz

O2 | Mobilní tarif, internet, televize a balíčky O2 Spolu

Last scanned Aug 1, 2026, 1:00 PM · 6 views

Overall score

Excellent

Summary

Dopřejte si to nejlepší: neomezený tarif i volání, rychlý internet, Oneplay nebo výhodný balíček služeb O2 Spolu. SEO is excellent (90/100) and accessibility is excellent (100/100). Security scores good (80/100) and performance excellent (90/100). Top issue: robots.txt not found.

O2 CZ

Dopřejte si to nejlepší: neomezený tarif i volání, rychlý internet, Oneplay nebo výhodný balíček služeb O2 Spolu. Vše online i aplikaci Moje O2.

Top issues to fix

5 issues found · 1 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 X-Frame-Options header
Security
Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
robots.txt not found
SEO
Publish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEO
Publish an XML sitemap and reference it from robots.txt to speed up page discovery.
20 broken links on the page
SEO
Fix or remove broken links — they waste crawl budget and erode user trust.

SEO

2 issue(s) found

Performance

1.12 s

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Score history

-3 overall since Jul 25, 2026

Overall: 90
SEO: 90
Security: 80
Performance: 90
Accessibility: 100

Organization

Company details published in this site's own structured data.

O2 CZ

Dopřejte si to nejlepší: neomezený tarif i volání, rychlý internet, Oneplay nebo výhodný balíček služeb O2 Spolu. Vše online i aplikaci Moje O2.

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Contact

Email, phone, and address published on this site's own pages.

Email: 9d2f87f07f4d32cfc6070f614d7631fd@monitoring-widget.o2.cz

Meta tags

Title: O2 | Mobilní tarif, internet, televize a balíčky O2 Spolu
Description: Dopřejte si to nejlepší: neomezený tarif i volání, rychlý internet, Oneplay nebo výhodný balíček služeb O2 Spolu. Vše online i aplikaci Moje O2.
Canonical: https://www.o2.cz
Language: cs
Charset: utf-8
Viewport: width=device-width, initial-scale=1
Robots meta
Manifest: https://www.o2.cz/manifest.json?_linka=a995131

Technologies

Detected frameworks, languages, and tools.

No technologies detected.

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: DigiCert Inc
Subject: www.o2.cz
Valid from: Sep 24, 2025
Valid to: Sep 23, 2026
Days until expiry: 53
SAN domains: www.o2.cz, o2.cz

Security headers

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

Compression: gzip · 2 cookie(s) observed

Content & assets

Headings

H1 1 · H2 6 · H3 15

Links

51 internal · 32 external · 20 broken

Images

21 total · 0 missing alt

Scripts / Styles

16 scripts · 1 stylesheets

JS / CSS size

19.7 KB · 0 B

Page size

189 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

Scan details

Requested URL: https://o2.cz
Final URL: https://www.o2.cz
HTTP status: 200
HTTP version: HTTP/1.1
Response time: 1.12 s
HTML size: 189 KB
Redirect chain: https://o2.cz → https://www.o2.cz

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Frequently asked questions

What technology does o2.cz use?: We did not detect any specific technologies for o2.cz in the latest scan.
Is o2.cz secure (HTTPS)?: Yes. o2.cz uses TLS 1.3 with a certificate issued by DigiCert Inc, valid until Sep 23, 2026.
Who hosts o2.cz?: Hosting provider information for o2.cz is not available yet.
What is o2.cz's SEO score?: o2.cz scored 90/100 for SEO in the latest analysis (excellent).
What is o2.cz's overall website score?: o2.cz has an overall SiteGraph score of 90/100, combining SEO, performance, security, and accessibility.
What company operates o2.cz?: o2.cz is operated by O2 CZ. Dopřejte si to nejlepší: neomezený tarif i volání, rychlý internet, Oneplay nebo výhodný balíček služeb O2 Spolu. Vše online i aplikaci Moje O2.
Has o2.cz's score changed over time?: o2.cz's overall score has declined by 3 points (from 93 to 90) since Jul 25, 2026.