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onc.nl

.nl ok HTTP/1.1 200 328 ms

First seen 2026-06-17 · Last seen 2026-06-17 · crawled 2026-06-17

NL · 149.210.154.240 · AS20857 Signet B.V.

Reputation 92/100 no dmarc policy

sector education subsector school type homepage

HTML metadata

Title
Oranje Nassau College Zoetermeer
Language
nl

Technology

Server
Apache
Fonts
  • Google Fonts

Third-party hosts loaded (3)

  • fonts.googleapis.com×2
  • cdn.jsdelivr.net×1
  • fonts.gstatic.com×1

DNS records live

NS
  • ns0.transip.net
  • ns1.transip.nl
  • ns2.transip.eu
MX
  • 0 onc-nl.mail.protection.outlook.com

Email authentication weak

SPF
v=spf1 include:_spf.zivver.com include:spf.protection.outlook.com -all
strict (-all)
DMARC
not published
DKIM
  • selector1: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqSNGAEdEEzOYcDVBydh+CwcKuAv8iO9yuLcVt6TngCA2jM+PqrqhFrkY6Beaodtk0tnPviiZpDFEmD…
  • selector2: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAq6g+zrSCXZDY7RzsQhVp2hYBN+znI6v5Xgt44F0CG9PclXEYOXBeRViqhdkmpoMhzsILsUCsDXn2t0…
selectors probed

Certificate (current)

YR1
from 2026-06-08 to 2026-09-06
Expires in 77 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 75/100 Checked live page: https://onc.nl/

present
  • strict-transport-security
  • x-frame-options
  • x-content-type-options
  • referrer-policy
findings
  • missing Content Security Policy
  • missing Permissions Policy
Header values
referrer-policy
same-origin
x-frame-options
SAMEORIGIN
x-content-type-options
nosniff
strict-transport-security
max-age=63072000; includeSubDomains

Linked from (2)

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