instondo.nl

.nl crawl

First seen 2026-06-03 · Last seen 2026-06-04 · ok HTTP/1.1 200 540 ms crawled 2026-06-03

NL · 85.158.202.101 · AS25151 Cyso Group B.V.

Reputation 94/100 dmarc monitor-only

Classifying

HTML metadata

Title: Instituut voor Onderwijs Ondersteuning
Language: en

Technology

Server: Apache
PHP: 8.2.30 security-only
jQuery: 3.2.1 known XSS (<3.5)
Stack: PHP

Analytics

Google Tag Manager

Fonts

Google Fonts

Third-party hosts loaded (10)

www.instondoboeken.nl×17
cdn.jsdelivr.net×10
fonts.googleapis.com×2
cdnjs.cloudflare.com×1
code.jquery.com×1
fonts.gstatic.com×1
kit.fontawesome.com×1
maxcdn.bootstrapcdn.com×1
stackpath.bootstrapcdn.com×1
www.googletagmanager.com×1

Social

Contact

Email

info@instondo.nl

Phone

0786455085

DNS records live

NS

ns03.2is.nl
ns04.2is.be
ns05.2is.nl

MX

0 instondo-nl.mail.protection.outlook.com

Email authentication partial

SPF

v=spf1 mx a include:spfa.instondo.nl include:_spf.prolocation.net include:spf.protection.outlook.com ~all

softfail (~all)

DMARC

v=DMARC1; p=none;

policy: none (monitoring only)

DKIM

selector1: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCLqxDkr3UGr/rdeWNp/enFjVi1cNtgSAkhIZj/v5jMYzxoG3c8G/fVXBMQKjiWuv0NIIY/Z8tTAeacUgZ2pf…

selectors probed

Certificate (current)

R13

from 2026-04-06 to 2026-07-05

Expires in 30 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 70/100 Checked live page: https://www.instondo.nl/

present

strict-transport-security
x-frame-options
x-content-type-options

findings

missing Content Security Policy
missing Referrer Policy
missing Permissions Policy

Header values

x-frame-options: SAMEORIGIN
x-content-type-options: nosniff
strict-transport-security: max-age=63072000; includeSubDomains; preload