sidn.nl

HTML metadata

Title

Zorgeloos online | SIDN

Description

Bij SIDN check je de beschikbaarheid van een .nl-domeinnaam. Wij bieden je ook securityoplossingen, zoals SIDN Merkbewaking.

Language

nl

Canonical

https://www.sidn.nl/

Translations

en

Open Graph

url: https://www.sidn.nl/
title: Zorgeloos online | SIDN
site name: SIDN - Het bedrijf achter .nl
description: Bij SIDN check je de beschikbaarheid van een .nl-domeinnaam. Wij bieden je ook securityoplossingen, zoals SIDN Merkbewaking.

Technology

Server: openresty

Analytics

Piwik PRO

Third-party hosts loaded (3)

images.ctfassets.net×15
sidn.containers.piwik.pro×1
sidn.piwik.pro×1

Social

Registration

Registrar

Stichting Internet Domeinregistratie Nederland

Created

1999-11-18

Updated

2026-05-12

Name servers

ns2.sidn.nl
ns1.sidn.nl
ns3.sidn.nl

DNS records live

NS

ns1.sidn.nl
ns2.sidn.nl
ns3.sidn.nl

MX

0 sidn-nl.v-v1.mx.microsoft

TXT

Show 6 TXT records

google-site-verification=UgJBr_GdHnW8WlMHFlo59LLMiNz0g-T3g6ijOs7KBWE
b49e83a3cf3f49b49be0ceea668e8457
google-site-verification=nGdTpBOjSS2sHxxqhEE9Tj3xcK5X4-lF9YLqtYmXbwI
apple-domain-verification=VfW6PNm8hVwB49dm
DomainVerification=94J3KBJIL96UFC6L3FMIHJ07M95PUUE5CZKNBBDKJOH2PYF1MQGVQRDA0ZIE58II
HARICA-VFdR5pRm5ZpLvvWrNmw

Email authentication strong

SPF

v=spf1 a:ops-relay03-p.sidn.nl a:ops-relay04-p.sidn.nl a:ops-relayf03-p.sidn.nl a:ops-relayf04-p.sidn.nl a:ops-monext02-p.sidn.nl ip4:94.198.154.51 include:spf.protection.outlook.com ~all

softfail (~all)

DMARC

v=DMARC1; p=reject; rua=mailto:dmarc@sidn.nl,mailto:dmarc@sidn-nl.uriports.com; adkim=r; aspf=r; pct=100; rf=afrf; ri=86400; sp=reject

policy: reject (enforced) · sp=reject

DKIM

selector2: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCuMPlm/E5oKfgNadgsujyLzj7h87lvQ1z1ruYSDClHkADvAAFCrG4Y7AYWf9xtGoJiKjmQoSIO5IkjihavU2…

selectors probed

Certificate (current)

GEANT TLS RSA 1

from 2025-11-06 to 2026-11-06

Expires in 170 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 95/100 Checked live page: https://www.sidn.nl/

present

strict-transport-security
content-security-policy
x-frame-options
x-content-type-options
referrer-policy
permissions-policy

findings

CSP uses wildcard sources

Header values

referrer-policy: strict-origin-when-cross-origin
x-frame-options: SAMEORIGIN
permissions-policy: camera=(), microphone=()
x-content-type-options: nosniff
content-security-policy: base-uri 'self' https://www.sidn.nl https://www.sidnlabs.nl;default-src 'self';connect-src 'self' https://*.algolia.net https://*.algolianet.com https://*.dynamics.com https://*.europe-west4.run.app https://*.facebook.com https://*.googleapis.com https://*.googlesyndication.com https://*.linkedin.com https://*.linkedin.oribi.io https://*.piwik.pro https://*.recruitee.com https://*.sidn.nl https://sidn.nl https://*.twitter.com https://*.typeform.com https://*.usercentrics.eu https://*.usmedia.nl https://api.opencagedata.com https://vimeo.com https://www.google.com https://*.run.app https://sidn.mosparo.usmedia.nl;font-src 'self' data: https://*.googleapis.com https://*.gstatic.com https://*.piwik.pro https://*.twitter.com https://*.typeform.com https://vimeo.com;form-action 'self' https://*.dynamics.com https://*.mailplus.nl https://internet.nl https://sidn.activehosted.com https://sidn.recruitee.com;frame-ancestors 'none';frame-src 'self' https://*.azureedge.net https://*.doubleclick.n
strict-transport-security: max-age=63113904