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Tech stack of Skupina ČEZ (cez.cz)

https://www.cez.cz
Skupina ČEZ
Cached · Oct 21, 2026
Re-scan
5Technologies
3Categories
200HTTP Status
4365msScan Time
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Tech stack of www.cez.cz badge

AI builder check

No AI builder evidence found

No evidence

None of the 33 fingerprints we track for 9 AI app builders (Lovable, Bolt.new, v0, Replit, Base44, Manus, Anything, Emergent and YouWare) appear on this page. That is not proof the site was coded by hand: code written with AI assistants such as Cursor, Claude Code or GitHub Copilot leaves no public trace, and builder markers can be removed after an export.

This check names the builder platform from public evidence. It does not measure how much of the code was written by AI. How the check works and how accurate it is

Detected technologies (5)

React

JavaScript library for building user interfaces

Framework
99%
confidence
Evidence (2 signals)
Js Global
React global variables or attributes
data-reactroot
Html Pattern
React-specific DOM attributes
data-reactroot

Next.js

React framework for production

Framework
99%
confidence
Evidence (1 signal)
Html Pattern
Next.js data injection or asset paths
_next/static

Swiper

Modern touch slider library

UI Library
90%
confidence
Evidence (1 signal)
Html Pattern
Swiper slider markup
class="swiper-wrapper

Tailwind CSS

Utility-first CSS framework

UI Library
80%
confidence
Evidence (1 signal)
Html Pattern
Tailwind variant-prefixed utility classes
class="fixed z-[999] opacity-0 pointer-events-none focus:pointer-events-auto focus:top-[90px] focus:xl:top-[160px] focus:left-[10px] focus:opacity-100 border-[1px] border-black bg-white px-5 py-4 text

Node.js

JavaScript runtime built on Chrome's V8 engine

Language Implied
69%
confidence
Evidence (1 signal)
Implied
Implied by Next.js
Detected Next.js → implies Node.js

Website details

Network & TLS

IP address89.111.76.144
All resolved IPs89.111.76.144, 2a01:a040:2004:3::100
Reverse DNSwww.cez.cz
ProtocolHTTP/1.1
TLS issuerDigiCert Inc
Cert. expires Dec 18, 2026 58 days

DNS records

Nameserversns10.cez.cz ns11.cez.cz ns20.cez.cz ns21.cez.cz
Mail serverssmtp11.cez.cz smtp12.cez.cz smtp21.cez.cz smtp22.cez.cz

Security headers 6/6

strict-transport-securityPresent
content-security-policyPresent
x-content-type-optionsPresent
x-frame-optionsPresent
referrer-policyPresent
permissions-policyPresent

Page insights

LanguageCS
HTML size248 KB (gzip)
Resources37 scripts · 1 stylesheets · 26 images
Third-party hosts14 dev.visualwebsiteoptimizer.com, www.cezesco.cz, kdejinde.jobs.cz, www.cezdeutschland.de, www.cezfrance.fr, www.energetickeuspory.cz, …
Open GraphPresent
Raw HTTP Headers
content-security-policy default-src 'self' https://*.hotjar.io https://media.cez.cz data:;frame-ancestors https://*.setrim.cz https://*.cez.cz *.cezdata.corp https://*.cezdistribuce.cz https://www.dev.cez.cz;style-src 'self' data: 'unsafe-eval' 'unsafe-inline' https://setrim.cz https://ceztipy.cz/ https://*.cez.cz https:/
expect-ct max-age=0
strict-transport-security max-age=16070400; includeSubDomains
x-content-type-options nosniff
referrer-policy no-referrer
x-xss-protection 0
link </llms.txt>; rel="describedby" type="text/markdown", </llms-full.txt>; rel="describedby" type="text/markdown", </sitemap-index.xml>; rel="sitemap", </robots.txt>; rel="https://www.rfc-editor.org/rfc/rfc9309", </.well-known/api-catalog>; rel="api-catalog"
cache-control s-maxage=360, stale-while-revalidate
content-encoding gzip
content-type text/html; charset=utf-8
set-cookie BIGipServerpool_wls_edee_9050=rd506o00000000000000000000ffffac1dceabo9050; path=/; Httponly; BIGipServerpool_wls_edee_ext_9050=rd1o00000000000000000000ffffac1dcf66o9050; path=/; Httponly; Secure; TS011ed87d=01604099e5f9c8e10405a8de86d7bd73628c86e1daea619811590e24b5b1123ec2f5a5079058d42a5571ee0ae6023
x-frame-options SAMEORIGIN
permissions-policy accelerometer=(), geolocation=(self), gyroscope=(), magnetometer=(), payment=(), usb=(), camera=(), microphone=(), fullscreen=(self)
transfer-encoding chunked

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