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congstar.de

https://congstar.de· First analyzed 01 May 2026· Updated 01 May 2026
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congstar.de
Desktop screenshot of congstar.de
Mobile screenshot of congstar.de
Mobile

Sponsored

Hosting Provider

Deutsche Telekom AG

IP Address

194.150.228.43

Site Location

🇩🇪 Germanyvia tld

Server Location

🇩🇪 Frankfurt am Main, Germany

ASN

AS3320

Organization

Deutsche Telekom AG

Server

Apache

Nameservers

ns1.telekom.net.dns1.telekom.de.dns2.telekom.de.pns.dtag.de.

Performance

97

Core Web Vitals

Weight

First Contentful Paint
977 ms10%
Speed Index
1.3 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
538 KB
56 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
TYPO3

Technology Stack

3 Technologies Detected

Frameworks

1
Vue.js

CSS Frameworks

1
Tailwind CSS

Web Servers

1
Apache

SEO Analysis

B79/100
23
5
0
Meta Tags15/15
Content11/12
Headings8/8
Technical21/25
E-E-A-T0/7
Images5/7
Links5/5
URL5/5
Social2/5
Freshness0/4
Mobile4/4
Indexability3/3
C
congstar.decongstar.de

Mobilfunk | Prepaid | Handytarife | Smartphones | 5G | DSL

Dein Anbieter für alle Ansprüche: ✔ Günstig ✔ Fair ✔ Verträge mit und ohne Laufzeit ✔ 5G Option ✔ mit GB+ automatisch mehr Datenvolumen jedes Jahr.

Title Length58 chars

Recommended: 50-60 chars (~348px / 580px)

Description Length149 chars

Recommended: 120-160 chars

Issues (0)

    5 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    246 URLs

    robots.txt

    23 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    7/100
    Poor
    2 14 1

    This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

    Sponsored

    AI & LLM Readiness

    D44/100
    Bot Access
    20/25
    Machine Read.
    11/25
    Schema Data
    2/25
    Citation
    11/25

    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
    nav
    Text ratio:4%
    Words:835
    Token eff.:Optimal
    Sections/1K:9.6
    Depth:1/5

    Structured Data

    1 JSON-LD
    WebSite

    Citation Readiness

    Opening Summary640w
    Descriptive Headingsavg 2.8w
    Canonical URL
    Open Graph1/3
    Twitter Card1/3
    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
    82/100
    14
    Passed
    2
    Critical
    1
    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
    6/15
    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.
    58/100
    A
    67 mg
    CO₂e / view
    538.1 KB
    Page Weight
    80%
    Cleaner Than
    New Visitor
    76 mg
    vs
    Returning (cached)
    38 mg
    Annual (10K/mo)
    8.0 kg
    Emission Segments
    Data Center
    15 mg
    Network
    16 mg
    Device
    36 mg
    Resource Breakdown
    JavaScript
    308.9 KB
    Images
    200.2 KB
    CSS
    3.3 KB
    HTML
    25.4 KB
    Other
    342 B
    Green Hosting Not Verified
    Deutsche Telekom AG
    5 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    D

    Security Score

    56%Poor
    Interactive

    HTTPS

    No WAF

    151d

    Certificate Details

    Type

    Organization Validated (OV)

    Certificate Authority

    Deutsche Telekom Security GmbH

    Key Algorithm

    ECDSA (secp384r1) (384 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/1.1

    Valid From

    16.03.2026

    Valid Until

    29.09.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    *.congstar.decongstar.de

    SHA-256 Fingerprint

    FD:60:D6:9F:3F:41:42:A6:F6:DD:97:B8:09:92:DE:82:A2:6C:5F:A1...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    accept-ranges
    bytes
    age
    44980
    cache-control
    🔴 No Cache(no-cache, no-store, must-revalidate)
    content-encoding
    📦 Gzip(gzip)
    content-language
    de-DE
    content-length
    25728
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    65

    SPF
    DKIM
    DMARC

    DMARC Policy

    None (Monitor Only)

    MX Records (1)

    mail.congstar.de

    Domain Information

    congstar.de

    Last Updated

    01.06.2023

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Quantcast Choice

    Cookie Consent Banner
    Quantcast Choice
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: Quantcast Choice
    Privacy policy page linked
    Data Protection Officer 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
    79/100
    Mobile Friendly36 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, shrink-to-fit=no
    1 recommendation
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Interstate

    WCAG Partial
    74/100
    Readability
    /30
    24/30

    16px · LH 1.63

    Hierarchy
    /20
    19/20

    2x ratio · ✓ H1→H6

    WCAG
    /25
    15/25

    1:1 min contrast

    Performance
    /25
    16/25

    2 fonts

    Heading Font

    Interstate

    Sans32px

    Body Font

    Interstate

    Sans16px

    Contrast Ratio

    1:1

    13 issues

    Reading Comfort

    ~44 CPL

    Narrow lines
    32px
    h1
    48px
    h2
    32px
    h3
    16px
    p
    Minor Second
    Scale

    ✅ Excellent readability: 16px body text is ideal for all devices.

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

    ⚠️ Partial contrast: 13 elements below WCAG AA threshold (min 1.0:1).

    ✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

    ✅ Strong hierarchy: Headlines are 2.0x larger than body text.

    ✅ Modern fluid typography: clamp() with rem units ensures zoom accessibility (WCAG 1.4.4).

    Buy on MyFontsFluid Type (rem)Flesch 41

    Color Palette

    9 unique colors
    Dark
    #121212
    Background· 74.9%
    #faef7e
    Primary· 4.2%
    #129396
    Accent· 3.8%
    #502c78
    Secondary· 3.6%
    #bb0319
    Accent· 3.4%
    #883d9c
    Secondary· 3.4%
    #997c8d
    Secondary· 2.7%
    #7abec1
    Secondary· 2.2%

    Business & Marketing Stack

    2 Tools Detected

    Advanced

    Behavior Analytics

    1
    Google AnalyticsFree

    User behavior and product analytics

    A/B Testing & Optimization

    1
    KameleoonEnterprise

    Experimentation and conversion optimization

    2

    Categories

    2

    Total Tools

    1

    Enterprise

    0

    Mid-Market

    Assessment: Well-developed marketing technology stack

    Sponsored

    Scripts & Styles

    24 Resources

    20
    Scripts
    4
    Styles
    3
    Async
    2
    Defer

    Top Script Sources

    cdn.congstar.de(11)app.usercentrics.eu(2)ts.congstar.de(2)integrations.etrusted.com(2)congstar.de(2)

    Website Identity

    congstar

    www.congstar.de/
    Location detected: 🇩🇪 Germanyvia tld
    de

    Sponsored

    Last analyzed: 01 May 2026 at 02:55

    Historical Analysis & Change Tracking