cursuscatalogus.nl

.nl crawl

First seen 2026-05-20 · Last seen 2026-05-30 · ok HTTP/1.1 200 2033 ms crawled 2026-05-27

NL · 52.174.35.5 · AS8075 Microsoft Corporation

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title: OOM - Cursuscatalogus

Technology

Server: Microsoft-IIS
ASP.NET: 4.0.30319

Analytics

Google Tag Manager

Fonts

Google Fonts

Third-party hosts loaded (3)

www.googletagmanager.com×2
cloudstatic.obi4wan.com×1
fonts.googleapis.com×1

Contact

Email

info@oom.nl

Registration

Registrar

team.blue nl B.V.

Created

2006-02-22

Updated

2026-02-19

Name servers

ns3.dn-s.nl
ns4.dn-s.nl
ns1.dn-s.nl
ns2.dn-s.nl

DNS records live

NS

ns1.dn-s.nl
ns2.dn-s.nl
ns3.dn-s.nl
ns4.dn-s.nl

MX

80 d339285.a.ess.de.barracudanetworks.com
85 d339285.b.ess.de.barracudanetworks.com

TXT

prd-oom-cursuscatalogus.azurewebsites.net
_826yrpy7ok8j7igz6tb02xjj89sgp6m

Email authentication weak

SPF: v=spf1 mx a ip4:77.242.114.83/32 a:mf1.oom.nl include:spf.protection.outlook.com include:_spf.psm.knowbe4.com include:spf.ess.de.barracudanetworks.com -all
strict (-all)
DMARC: not published
DKIM: no key found at common selectors

Certificate (current)

GeoTrust TLS RSA CA G1

from 2025-08-27 to 2026-08-31

Expires in 89 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://cursuscatalogus.nl/Cursuscatalogus

findings

missing HSTS
missing Content Security Policy
missing frame protection
missing content type protection
missing Referrer Policy
missing Permissions Policy