cwi.nl

.nl crawl

First seen 2026-05-11 · Last seen 2026-05-19 · ok HTTP/1.1 200 14002 ms crawled 2026-05-17

NL · 192.16.191.43 · AS1888 Stichting Centrum voor Wiskunde en Informatica

Reputation 100/100

Classifying

HTML metadata

Title: Home
Language: en

Open Graph

url: https://www.cwi.nl/en/
title: Home
description: Welcome to Centrum Wiskunde & Informatica

Technology

Server: nginx
CMS: Gatsby

Third-party hosts loaded (1)

cdnjs.cloudflare.com×1

Social

Contact

Email

Phone

+31205929333

DNS records live

NS

dwalin.nikhef.nl
ns1.cwi.nl
ns1.zurich.surf.net
ns2.cwi.nl

MX

10 mx.soverin.net

TXT

Show 9 TXT records

apple-domain-verification=vKvt2VfbB2WZUhzQ
Science Park 123, 1098 XG Amsterdam, Netherlands
CWI (Centrum Wiskunde & Informatica)=pnqgTeOiurzbz4yD
adobe-idp-site-verification=a8667c98581a66df82f18dd9b4ec9ad04d2b0214fda298afa04b69ae89b16b4d
MS=ms63043750
HARICA-SnDN4Irx82qOUXNni8S
Centrum Wiskunde & Informatica
ZOOM_verify_-TwabqfPQI2RrsWzDjTwfQ
ZOOM_verify_QtFtKLPNUTBlqUfH6kXTNZ

Email authentication strong

SPF

v=spf1 ip4:192.16.191.0/27 ip4:192.174.88.179 ip4:192.174.88.180 ip4:13.58.74.171 include:_spf.surfmailfilter.nl include:projects5.greenlightsolutions.nl include:spf.protection.outlook.com ~all

softfail (~all)

DMARC

v=DMARC1;p=quarantine

policy: quarantine

DKIM

default: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDgFbxWcu/m9TuCvj7xwjZX4s9fWAdi/NIFBUF9vTKQOSt9F/aVGVc6g5/yu+nbilhlMSQaUSbr9chbeTIwmq…
selector1: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA3PAO1QA56Ap0tx8wfAA7axknePsLN+yzH1Q8helKWm2F0UszrJNxIvbA+C+ZypSCRdPE8opSCIxHl1…

selectors probed

Certificate (current)

GEANT TLS ECC 1

from 2026-03-06 to 2027-03-06

Expires in 291 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 75/100 Checked live page: https://www.cwi.nl/en/

present

strict-transport-security
x-frame-options
x-content-type-options
referrer-policy
cross-origin-opener-policy

findings

missing Content Security Policy
missing Permissions Policy

Header values

referrer-policy: same-origin
x-frame-options: DENY
x-content-type-options: nosniff
strict-transport-security: max-age=63072000
cross-origin-opener-policy: same-origin