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cra.cz

https://cra.cz· First analyzed 16 May 2026· Updated 16 May 2026
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cra.cz
Desktop screenshot of cra.cz
Mobile screenshot of cra.cz
Mobile

Sponsored

Hosting Provider

CRA

IP Address

82.99.169.74

Site Location

🇨🇿 Praha 6, Czech Republicvia schema_nap

Server Location

🇨🇿 Jihlava, Czechia

ASN

AS25248

Organization

CRA

Nameservers

ns1.bluetone.cz.ns.bluetone.cz.ns2.bluetone.cz.

Performance

89

Core Web Vitals

Weight

First Contentful Paint
1.5 s10%
Speed Index
2.0 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
2.1 MB
60 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Tailwind CSS
Infrastructure
Hosting
CRA

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

8 Technologies Detected

Analytics

4
Google Analytics
Google Analytics 4
Hotjar
Microsoft Clarity

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Tag Managers

1
Google Tag Manager

Security

1
reCAPTCHA

SEO Analysis

A83/100
25
4
0
Meta Tags13/15
Content10/12
Headings8/8
Technical24/25
E-E-A-T2/7
Images7/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile3/4
Indexability3/3
C
cra.czcra.cz

Datové centrum, přenos dat, Cloud a IoT | České Radiokomunikace

Jsme poskytovatelem unikátní televizní, rozhlasové a internetové infrastruktury. Převádíme technologické trendy do inovativních mediálních, telekomunikačních...

Description truncated.
Title Length63 chars

Recommended: 50-60 chars (~380px / 580px)

Description Length188 chars

Recommended: 120-160 chars

Issues (0)

    4 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    1 URLs

    1 sub-sitemaps

    robots.txt

    2 rules

    Sitemap reference found

    Allows all crawlers

    Local SEO

    Local Search Readiness

    24/100
    Needs Work
    6 14

    Sponsored

    AI & LLM Readiness

    D46/100
    Bot Access
    20/25
    Machine Read.
    7/25
    Schema Data
    7/25
    Citation
    12/25

    AI Bot Access

    14/14 accessible
    AI Search
    OAI-SearchBot
    PerplexityBot
    Claude-SearchBot
    Gemini-Deep-Research
    DuckAssistBot
    Training
    GPTBot
    ClaudeBot
    Google-Extended
    Meta-ExternalAgent
    Bytespiderinfo
    Amazonbot
    Applebot-Extended
    CCBotinfo
    Fetch
    ChatGPT-User

    Machine Readability

    llms.txt
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    Text ratio:7%
    Words:2,860
    Token eff.:Optimal

    Structured Data

    3 JSON-LD
    Organization×1.1WebSiteSearchAction
    sameAs entity links

    Citation Readiness

    Opening Summary238w
    Descriptive Headingsavg 5w
    Canonical URL
    Open Graph3/3
    Twitter Card0/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (11)
    AI readiness recommendation preview...
    Upgrade to view recommendations

    Sponsored

    Accessibility

    WCAG 2.1 Compliance

    Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
    A
    83/100
    15
    Passed
    1
    Critical
    2
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    20/20
    Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
    Forms & Inputs
    10/15
    Verifies form fields have labels, error messages are clear, and inputs are properly associated.
    Color & Contrast
    15/15
    Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
    Keyboard & Focus
    11/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    7/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    2 recommendations
    • •Accessibility recommendation preview...
    Upgrade to view recommendations

    Carbon Footprint

    SWDM v4 · Eco-Score

    Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
    31/100
    D
    267 mg
    CO₂e / view
    2.1 MB
    Page Weight
    50%
    Cleaner Than
    New Visitor
    305 mg
    vs
    Returning (cached)
    153 mg
    Annual (10K/mo)
    32.1 kg
    Emission Segments
    Data Center
    60 mg
    Network
    64 mg
    Device
    143 mg
    Resource Breakdown
    JavaScript
    247.0 KB
    Images
    190.4 KB
    CSS
    167.5 KB
    Fonts
    1.3 MB
    HTML
    14.0 KB
    Other
    184.0 KB
    Green Hosting Not Verified
    CRA
    6 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    A

    Security Score

    86%Very Good
    Interactive

    HTTPS

    No WAF

    47d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Google Trust Services

    Key Algorithm

    RSA (4096 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/1.1

    Valid From

    04.04.2026

    Valid Until

    03.07.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    cra.czwww.cra.cz

    SHA-256 Fingerprint

    8D:66:2A:49:4C:EF:81:2E:77:BC:CB:47:3F:38:F3:19:3C:33:0E:63...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🔴 No Cache(no-cache, no-store, must-revalidate)
    connection
    keep-alive
    content-encoding
    📦 Gzip(gzip)
    content-length
    14037
    content-security-policy
    upgrade-insecure-requests;
    content-type
    text/html; charset=UTF-8
    Good Warning Issue

    Email Infrastructure

    Microsoft 365

    Score

    98

    SPF
    DKIM
    DMARC

    DMARC Policy

    Quarantine (Moderate)

    MX Records (1)

    cra-cz.mail.protection.outlook.com

    Domain Information

    cra.cz

    Domain Age
    28y 11m

    Created

    07.06.1997

    Expires

    12.10.2026

    Last Updated

    01.04.2022

    Registrar

    REG-INTERNET-CZ

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookiebot

    Cookie Consent Banner
    Cookiebot
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: Cookiebot
    Privacy policy page linked
    Data Protection Officer mentioned
    Legitimate interest basis mentioned

    Mobile Compatibility

    Viewport & Responsive Test

    Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
    B
    72/100
    Mobile Friendly24 breakpoints
    Viewport Meta
    The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
    Responsive Design
    Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
    Touch Icons
    Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
    Readable Font Size
    Base font size should be at least 16px on mobile to ensure text is readable without zooming.
    Relative Units
    Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
    No H-Scroll Risk
    No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
    Tap Targets OK
    Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
    No Fixed Widths
    No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
    Viewport
    width=device-width, initial-scale=1.0, maximum-scale=1
    3 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Nunito

    WCAG Partial
    54/100
    Readability
    /30
    11/30

    14px · LH 2.00

    Hierarchy
    /20
    14/20

    2.14x ratio

    WCAG
    /25
    13/25

    1:1 min contrast

    Performance
    /25
    16/25

    2 fonts · 7 req

    Heading Font

    Nunito

    Sans30px

    Body Font

    Nunito

    Sans14px

    Contrast Ratio

    1:1

    15 issues

    Reading Comfort

    ~104 CPL

    Too wide
    30px
    h1
    40px
    h2
    14px
    p
    Perfect Fourth
    Scale

    ⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

    ⚠️ Wide line spacing (2.00). 1.4–1.6 is optimal for body text.

    ❌ Very long lines: ~104 chars/line causes eye strain. Add max-width constraint.

    ⚠️ Hard to read: Flesch score 41/100. Simplify sentences for wider reach.

    ⚠️ Partial contrast: 15 elements below WCAG AA threshold (min 1.0:1).

    ❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

    Buy on MyFontsFlesch 41

    Color Palette

    6 unique colors
    Light
    #070e19
    Accent· 36.8%
    #283033
    Text· 34%
    #111d33
    Secondary· 13.100000000000001%
    #44688e
    Secondary· 6.8%
    #2c3b4d
    Primary· 5.4%
    #b7c8d1
    Secondary· 3.8%

    Business & Marketing Stack

    4 Tools Detected

    Advanced

    Behavior Analytics

    3
    Google Tag ManagerFree
    Google AnalyticsFree
    Microsoft ClarityFree

    User behavior and product analytics

    Privacy & Cookies

    1
    CookiebotMid-Market

    Cookie consent and privacy compliance tools

    2

    Categories

    4

    Total Tools

    0

    Enterprise

    1

    Mid-Market

    Assessment: Well-developed marketing technology stack

    Sponsored

    Scripts & Styles

    16 Resources

    15
    Scripts
    1
    Styles
    11
    Async
    2
    Defer

    Top Script Sources

    clarity.ms(5)googletagmanager.com(3)scripts.clarity.ms(2)consent.cookiebot.com(2)local(2)

    Website Identity

    České Radiokomunikace

    České Radiokomunikace

    Organization

    Jsme poskytovatelem unikátní televizní, rozhlasové a internetové infrastruktury. Převádíme technologické trendy do inovativních mediálních, telekomunikačních a IT infrastrukturních služeb.

    +420424411111
    www.cra.cz
    28 years old

    Skokanská 2117/1, Praha 6

    169 00, Praha 6

    CZ

    Location detected: 🇨🇿 Czech Republic, Praha 6via schema_nap
    REG-INTERNET-CZ📧 Microsoft 365cs

    Sponsored

    Last analyzed: 16 May 2026 at 22:10

    Historical Analysis & Change Tracking