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aob.nl

https://aob.nl· First analyzed 13 May 2026· Updated 13 May 2026
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aob.nl
Desktop screenshot of aob.nl
Mobile screenshot of aob.nl
Mobile

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Hosting Provider

True B.V

IP Address

87.233.198.80

Site Location

🇳🇱 Netherlandsvia tld

Server Location

🇳🇱 Amsterdam, The Netherlands

ASN

AS15703

Organization

True B.V

Server

Apache

Nameservers

auth03.dns.trueserver.nl.auth01.dns.trueserver.nl.auth02.dns.trueserver.nl.

Performance

99

Core Web Vitals

Weight

First Contentful Paint
830 ms10%
Speed Index
1.1 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
2 MB
41 requests

Image Optimization

Lazy LoadWebP
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Ghost

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

5 Technologies Detected

Libraries

1
jQuery

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

Analytics

1
Matomo

Web Servers

1
Apache

SEO Analysis

A87/100
28
1
0
Meta Tags14/15
Content12/12
Headings8/8
Technical23/25
E-E-A-T2/7
Images6/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile4/4
Indexability3/3
A
aob.nlaob.nl

De website van de Algemene Onderwijsbond (AOb)

De AOb zet zich in voor het onderwijs. Met ruim 87.000 leden zijn we de grootste onderwijsvakbond van Nederland. Jij en je collega's kunnen op ons rekenen.

Title Length46 chars

Recommended: 50-60 chars (~292px / 580px)

Description Length155 chars

Recommended: 120-160 chars

Issues (0)

    1 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    4 URLs

    4 sub-sitemaps

    robots.txt

    2 rules

    Sitemap reference found

    Allows all crawlers

    Local SEO

    Local Search Readiness

    35/100
    Needs Work
    10 11

    Sponsored

    AI & LLM Readiness

    D51/100
    Bot Access
    20/25
    Machine Read.
    13/25
    Schema Data
    6/25
    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
    blockquotes
    Text ratio:7%
    Words:1,597
    Token eff.:Optimal
    Sections/1K:1.3
    Depth:1/5

    Structured Data

    2 JSON-LD
    Organization×1.1WebSiteSearchAction

    Citation Readiness

    Opening Summary444w
    Descriptive Headingsavg 3w
    Canonical URL
    Open Graph2/3
    Twitter Card3/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (10)
    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.
    C
    67/100
    9
    Passed
    2
    Critical
    2
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    18/20
    Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
    Forms & Inputs
    5/15
    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
    9/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    0/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    3 recommendations
    • •Accessibility recommendation preview...
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    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.
    43/100
    D
    252 mg
    CO₂e / view
    2.0 MB
    Page Weight
    50%
    Cleaner Than
    New Visitor
    288 mg
    vs
    Returning (cached)
    144 mg
    Annual (10K/mo)
    30.2 kg
    Emission Segments
    Data Center
    56 mg
    Network
    61 mg
    Device
    135 mg
    Resource Breakdown
    JavaScript
    103.6 KB
    Images
    734.8 KB
    CSS
    1.0 MB
    Fonts
    143.8 KB
    HTML
    26.2 KB
    Green Hosting Not Verified
    True B.V
    5 recommendations
    • •Carbon footprint recommendation preview...
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    C

    Security Score

    66%Fair
    Interactive

    HTTPS

    No WAF

    304d

    Certificate Details

    Type

    Organization Validated (OV)

    Certificate Authority

    Sectigo Limited

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/1.1

    Valid From

    10.02.2026

    Valid Until

    13.03.2027

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    *.aob.nlaob.nl

    SHA-256 Fingerprint

    CC:46:5B:0F:7B:71:2F:EA:EA:CA:72:7F:C8:39:F0:2C:8F:A7:6F:05...

    Top Recommendations

    Security recommendation preview

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    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🔴 No Cache(no-cache, must-revalidate)
    content-encoding
    📦 Gzip(gzip)
    content-length
    26556
    content-type
    text/html; charset=utf-8
    date
    Wed, 13 May 2026 11:03:02 GMT
    permissions-policy
    accelerometer=self, camera=(), gyroscope=self, magnetometer...
    Good Warning Issue

    Email Infrastructure

    Microsoft 365

    Score

    93

    SPF
    DKIM
    DMARC

    DMARC Policy

    Quarantine (Moderate)

    MX Records (1)

    aob-nl.mail.protection.outlook.com

    Domain Information

    aob.nl

    Domain Age
    29y 6m

    Created

    29.10.1996

    Last Updated

    11.07.2025

    Registrar

    Registrar.eu

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookie Notice (WP)

    Cookie Consent Banner
    Cookie Notice (WP)
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: Cookie Notice (WP)
    Privacy policy page linked

    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.
    C
    63/100
    Mobile Friendly
    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
    3 recommendations
    • •Mobile compatibility recommendation preview...
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    Typography & Readability

    Urbanist + Arial

    WCAG Partial
    71/100
    Readability
    /30
    21/30

    16px · LH 1.40

    Hierarchy
    /20
    20/20

    3.33x ratio · ✓ H1→H6

    WCAG
    /25
    12/25

    1:1 min contrast

    Performance
    /25
    18/25

    System fonts

    Heading Font

    Urbanist

    Sans53px

    Body Font

    Arial

    Sans16px

    Contrast Ratio

    1:1

    33 issues

    Reading Comfort

    ~40 CPL

    Narrow lines
    53px
    h1
    40px
    h2
    16px
    p

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

    ✅ Optimal line spacing: 1.40 ratio (ideal range 1.4–1.6).

    ⚠️ Hard to read: Flesch score 32/100. Simplify sentences for wider reach.

    ⚠️ Partial contrast: 33 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 3.3x larger than body text.

    Buy on MyFontsFlesch 32

    Color Palette

    10 unique colors
    Light
    #45b234
    Primary· 18.6%
    #01493b
    Primary· 17.8%
    #f2f4f7
    Background· 15.8%
    #b3ded1
    Primary· 13.4%
    #223029
    Secondary· 8.2%
    #9e987c
    Secondary· 6.8%
    #d8dfd1
    Secondary· 6.5%
    #efc440
    Accent· 5.4%

    Business & Marketing Stack

    2 Tools Detected

    Growing

    Behavior Analytics

    2
    Google Tag ManagerFree
    Google AnalyticsFree

    User behavior and product analytics

    1

    Categories

    2

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    10 Resources

    9
    Scripts
    1
    Styles
    4
    Async
    0
    Defer

    Top Script Sources

    cdn.jsdelivr.net(3)load.sst.aob.nl(2)local(2)static.diffuse.tools(1)stats.aob.nl(1)

    Website Identity

    Algemene Onderwijsbond

    Organization
    [email protected]
    0302989599
    www.aob.nl/
    29 years old

    Sint Jacobsstraat 22, The Netherlands, Utrecht

    3511 BS, The Netherlands, Utrecht

    Location detected: 🇳🇱 Netherlandsvia tld
    Registrar.eu📧 Microsoft 365nl-NL

    Sponsored

    Last analyzed: 13 May 2026 at 11:03

    Historical Analysis & Change Tracking