debibliotheekopschool.nl

.nl crawl

First seen 2026-05-31 · Last seen 2026-06-01 · ok HTTP/1.1 200 567 ms crawled 2026-06-01

NL · 20.23.2.223 · AS8075 Microsoft Corporation

Reputation 92/100 spf without fallback

Classifying

HTML metadata

Title: Home
Language: nl

Technology

Server: Apache

Third-party hosts loaded (1)

www.bibliotheek.nl×4

DNS records live

NS

ns1.surfnet.nl
ns1.zurich.surf.net

MX

10 aspmx.l.google.com
20 alt1.aspmx.l.google.com
20 alt2.aspmx.l.google.com
30 aspmx2.googlemail.com
30 aspmx3.googlemail.com

Verified for

HARICA

Email authentication strong

SPF

v=spf1 redirect=_s0rmrtdkw.sdmarc.net

missing all

DMARC

v=DMARC1; p=quarantine; pct=100; rua=mailto:a.0rmrtdkw@sdmarc.net,mailto:debibliotheekopschool.nl@dmarc-report.eprov.eu

policy: quarantine

DKIM

google: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCKggC/rO9D0Dp8LMSB+0VwIwIhULpiVbYF/8ixOuR5cdtPrENi4MQQ2lhTgtdfMwN/u9G/b+XQuUJ/i6SWgu…

selectors probed

Certificate (current)

GEANT TLS ECC 1

from 2026-05-22 to 2026-12-07

Expires in 188 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 65/100 Checked live page: https://www.debibliotheekopschool.nl/home.html

present

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

findings

short HSTS max-age
missing Content Security Policy
missing Referrer Policy
missing Permissions Policy

Header values

x-frame-options: DENY
x-content-type-options: nosniff
strict-transport-security: max-age=604800;includeSubDomains