indexo.dev

c3.nl

.nl crawl

First seen 2026-05-20 · Last seen 2026-05-27 · ok HTTP/1.1 200 1895 ms crawled 2026-05-27

US · 162.159.135.42 · AS13335 Cloudflare, Inc.

Reputation 89/100 weak security headers dmarc monitor-only

Classifying

HTML metadata

Title
Home - C3
Description
Centrum JongerenCommunicatie Chemie laat kinderen en jongeren kennismaken met chemie, life sciences en procestechniek zodat ze hun talenten hierin kunnen ontdekken.
Language
nl-NL
Canonical
https://www.c3.nl/

Open Graph

url
https://www.c3.nl/
title
Home - C3
locale
nl_NL
site name
C3
description
Centrum JongerenCommunicatie Chemie laat kinderen en jongeren kennismaken met chemie, life sciences en procestechniek zodat ze hun talenten hierin kunnen ontdekken.

Technology

CDN
Cloudflare
CMS
WordPress
jQuery
3.7.1
Analytics
  • Google Tag Manager
Fonts
  • Google Fonts

Third-party hosts loaded (4)

  • fonts.googleapis.com×2
  • www.googletagmanager.com×2
  • cdn.consentmanager.net×1
  • fonts.gstatic.com×1

Social

Registration

Registrar
Prolocation B.V.
Created
1999-04-09
Updated
2023-03-10
Name servers
  • ns1.as41887.nl
  • ns3.as41887.io
  • ns2.as41887.eu
  • ns4.as41887.it

DNS records live

NS
  • ns1.as41887.nl
  • ns2.as41887.eu
  • ns3.as41887.io
  • ns4.as41887.it
MX
  • 0 c3-nl.mail.protection.outlook.com
Verified for
  • Google

Email authentication partial

SPF
v=spf1 include:spf.protection.outlook.com include:spf.ymlp.com include:spf.buildnet.nl ip4:37.230.99.27 include:eu.mailgun.org include:_spf.exsilia.net include:spf.flowmailer.net -all
strict (-all)
DMARC
v=DMARC1;p=none;
policy: none (monitoring only)
DKIM
  • k2: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv2aC2KjGKLOwTweBY5A9RpjsxaBXR9r7OAU6U8/zn92ivImI75naUujWbItRI/QmL1jy5PWGqLwoUA…
selectors probed

Certificate (current)

WE1
from 2026-05-26 to 2026-08-24
Expires in 85 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 40/100 Checked live page: https://www.c3.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 (10)

Linked from (2)