indexo.dev

zwijsen.nl

.nl crawl

First seen 2026-05-27 · Last seen 2026-05-30 · ok HTTP/1.1 200 686 ms crawled 2026-05-30

US · 162.159.134.42 · AS13335 Cloudflare, Inc.

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title
Uitgeverij Zwijsen - Breng leren tot leven
Description
Al 180 jaar ontwikkelen wij lesmethodes en andere educatieve uitgaven voor het basisonderwijs. Ook maken we leesboeken en leerspellen voor thuis. Onze producten ondersteunen kinderen bij het ontdekken van de wereld.
Language
nl
Canonical
https://www.zwijsen.nl/

Technology

CDN
Cloudflare
CMS
WordPress
jQuery
3.7.1
Analytics
  • Google Tag Manager
Ads
  • Google Ads (DoubleClick)
Cookie consent
  • Cookiebot
Fonts
  • Adobe Fonts
  • Font Awesome
Social widgets
  • YouTube Embed
Third-party hosts loaded (12)
  • kit.fontawesome.com×2
  • use.fontawesome.com×2
  • consent.cookiebot.com×1
  • cookiebot.com×1
  • doubleclick.net×1
  • gmpg.org×1
  • googletagmanager.com×1
  • js-eu1.hs-scripts.com×1
  • use.typekit.net×1
  • www.youtube-nocookie.com×1
  • youtu.be×1
  • youtube.com×1

Social

DNS records live

NS
  • ns.internlnet.nl
  • ns3.internl.net
  • ns4.internl.net
MX
  • 0 zwijsen-nl.mail.protection.outlook.com
TXT
  • 0 issue sectigo.com
Verified for
  • Atlassian
  • Brevo
  • Google
  • Microsoft
  • Microsoft 365
  • OpenAI

Email authentication strong

SPF
v=spf1 include:_spf.zivver.com ip4:23.21.109.197 ip4:23.21.109.212 ip4:147.160.167.0/26 ip4:185.113.196.164/31 ip4:185.113.196.36 ip4:89.20.170.226 ip4:46.249.45.62 ip4:188.122.89.22 ip4:87.233.231.166 ip4:83.96.243.241 ip4:54.228.73.245 ip4:52.31.199.224 ip4:54.78.48.219 include:spf.protection.outlook.com include:_spf5.leaddesk.com include:spf.afas.online include:_spf.relay.mailprotect.be include:spf.mandrillapp.com include:servers.mcsv.net include:spf.topdesk.net -all
strict (-all)
DMARC
v=DMARC1; p=reject; sp=reject; rua=mailto:dmarc@zwijsen.nl;
policy: reject (enforced) · sp=reject
DKIM
Show 5 DKIM selectors
  • selector1: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv37veF1+M3+KTxiGc2WEN0im+M0v/j9HKWnP6ARwAsjuYpkrfLeyv/mUB7bzzdlFsBVSmq5353cFgL…
  • k1: k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDbNrX2cY/GUKIFx2G/1I00ftdAj713WP9AQ1xir85i89sA2guU0ta4UX1Xzm06XIU6iBP41VwmPwBGRNofhBVR+e6WHUo…
  • mail: k=rsa;p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDeMVIzrCa3T14JsNY0IRv5/2V1/v2itlviLQBwXsa7shBD6TrBkswsFUToPyMRWC9tbR/5ey0nRBH0ZVxp+lsmTxid2Y2z…
  • s1: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA5ditzrZC4mLkcyii3lMTu4WRxNRFVtxdAtXnDEs/rMiLnqLQKID3d+UhQCcEK+kwQHqAXM/PM4NwWj8SxA…
  • s2: k=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC1eV6/iiBz4/2go0wUxFqAyxoFtf1H9NP6+upt1k0F94nZv7SdX6JEZngwh+HTvxalLAuGrKDKc0rEfTGv+ry8jQ…
selectors probed

Certificate (current)

WE1
from 2026-04-27 to 2026-07-26
Expires in 56 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 40/100 Checked live page: https://www.zwijsen.nl/

present
  • x-content-type-options
findings
  • missing HSTS
  • missing Content Security Policy
  • missing frame protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
x-content-type-options
nosniff

Links to (7)

Linked from (2)