Back to Search
zas.be favicon

zas.be

https://zas.be· First analyzed 02 Jun 2026· Updated 02 Jun 2026
Export
zas.be
Desktop screenshot of zas.be
Mobile screenshot of zas.be
Mobile

Sponsored

Hosting Provider

HOSTING-SERVICE

IP Address

217.19.237.54

Site Location

🇧🇪 Belgiumvia tld

Server Location

🇧🇪 Ghent, Belgium

ASN

AS34762

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns3.combell.net.ns4.combell.net.ns1.combell.eu.

Performance

94

Core Web Vitals

Weight

First Contentful Paint
1.2 s10%
Speed Index
1.6 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
921 KB
46 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
CMS
Drupal
Infrastructure
Hosting
HOSTING-SERVICE
CDN
Cloudflare

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

7 Technologies Detected

CSS Frameworks

2
Bootstrap
Tailwind CSS

Analytics

2
Facebook PixelMatomo

Icon Libraries

1
Font Awesome

Fonts

1
Google Fonts

CDN

1
Cloudflare

SEO Analysis

A83/100
26
3
1
Meta Tags14/15
Content11/12
Headings8/8
Technical21/25
E-E-A-T3/7
Images2/7
Links5/5
URL5/5
Social5/5
Freshness2/4
Mobile4/4
Indexability3/3
Z
zas.bezas.be

Bezoek Ziekenhuis aan de Stroom (ZAS) | Antwerpen

ZAS is de grootste gezondheidsorganisatie in België en telt 13 campussen, verspreid over heel Antwerpen van noord tot zuid.

Title Length49 chars

Recommended: 50-60 chars (~302px / 580px)

Description Length123 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (6/10) — critical for accessibility and SEO

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

2 URLs

2 sub-sitemaps

robots.txt

47 rules

Sitemap reference found

Local SEO

Local Search Readiness

26/100
Needs Work
5 12 2

Sponsored

AI & LLM Readiness

D51/100
Bot Access
20/25
Machine Read.
11/25
Schema Data
2/25
Citation
18/25

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
navheader/footer
Text ratio:5%
Words:628
Token eff.:Optimal
Sections/1K:23.9
Depth:2/5

Structured Data

2 JSON-LD
WebSite

Citation Readiness

Opening Summary68w
Descriptive Headingsavg 3.2w
Canonical URL
Open Graph3/3
Twitter Card3/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (7)
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.
B
78/100
12
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
17/20
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
9/15
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.
3 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.
72/100
B
93 mg
CO₂e / view
920.8 KB
Page Weight
80%
Cleaner Than
New Visitor
106 mg
vs
Returning (cached)
53 mg
Annual (10K/mo)
11.2 kg
Emission Segments
Data Center
5 mg
Network
27 mg
Device
61 mg
Resource Breakdown
JavaScript
264.5 KB
Images
7.9 KB
CSS
594.2 KB
Fonts
936 B
HTML
12.8 KB
Other
40.5 KB
Green Hosting Verified
Combell
GWF Verified
3 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
B

Security Score

76%Good
Interactive

HTTPS

WAF

135d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Hellenic Academic and Research Institutions CA

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

15.10.2025

Valid Until

15.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

zas.bewww.zas.be

SHA-256 Fingerprint

F4:D5:91:C8:8C:B3:CB:3A:99:C2:84:6F:05:30:1D:EE:0E:23:7C:D1...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

age
115
cache-control
🟢 1 Month(max-age=2764800, public)
cf-cache-status
MISS
cf-ray
a0527cda596cdd64-EWR
content-encoding
⚡ Brotli(br)
content-language
nl
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

98

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

gza.in.tmes.trendmicro.eu

Domain Information

zas.be

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

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
71/100
Mobile Friendly1 breakpoint
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, maximum-scale=5, user-scalable=yes
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

-apple-system

WCAG Partial
81/100
Readability
/30
24/30

16px · LH 1.60

Hierarchy
/20
20/20

2.5x ratio · ✓ H1→H6

WCAG
/25
15/25

1.74:1 min contrast

Performance
/25
22/25

System fonts

Heading Font

-apple-system

Sans40px

Body Font

-apple-system

Sans16px

Contrast Ratio

1.74:1

1 issue

Reading Comfort

~38 CPL

Narrow lines
40px
h1
32px
h2
24px
h3
16px
h4
16px
p

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

✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

⚠️ Hard to read: Flesch score 43/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 1.7:1).

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

✅ Strong hierarchy: Headlines are 2.5x larger than body text.

GGoogle FontsFlesch 43

Color Palette

10 unique colors
12.58:1 AAA Light
#ffffff
Primary· 43%
#3b3131
Secondary· 5.2%
#7e7464
Secondary· 16.200000000000003%
#4c3f3b
Secondary· 6.8%
#266a5d
Primary· 6.7%
#6d5745
Secondary· 6.3%
#d3decf
Secondary· 3.3%
#849c91
Secondary· 2.1%

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

2
Matomo (Piwik)Mid-Market
Google AnalyticsFree

User behavior and product analytics

Advertising

1
Facebook PixelMid-Market

Ad platforms and retargeting pixels

Privacy & Cookies

1
CookiebotMid-Market

Cookie consent and privacy compliance tools

3

Categories

4

Total Tools

0

Enterprise

3

Mid-Market

Assessment: Well-developed marketing technology stack

Sponsored

Scripts & Styles

23 Resources

15
Scripts
8
Styles
6
Async
2
Defer

Top Script Sources

local(7)connect.facebook.net(2)consent.cookiebot.com(2)cdn.matomo.cloud(1)(1)

Website Identity

Ziekenhuis aan de Stroom [ZAS]

Ziekenhuis aan de Stroom [ZAS]

MedicalBusiness
www.zas.be/
Location detected: 🇧🇪 Belgiumvia tld
nl

Sponsored

Last analyzed: 02 Jun 2026 at 00:54

Historical Analysis & Change Tracking

zas.be Technology Stack - Built With Bootstrap, Tailwind CSS, Font Awesome, Google Fonts, Facebook Pixel | StackOptic | StackOptic