indexo.dev

underdark.nl

.nl crawl

First seen 2026-05-14 · Last seen 2026-05-19 · ok HTTP/1.1 200 1020 ms crawled 2026-05-19

NL · 185.73.32.3 · AS60781 LeaseWeb Netherlands B.V.

Reputation 100/100

Classifying

HTML metadata

Title
Welkom - Underdark
Description
Underdark deinst niet terug voor uitdagingen. Wij gaan verder. Verder waar anderen zeggen dat het onmogelijk is, dat er geen opties meer zijn. Verder dan 'State of the art'..
Language
nl

Open Graph

title
Welkom - Underdark
locale
nl
site name
underdark.nl
description
Underdark deinst niet terug voor uitdagingen. Wij gaan verder. Verder waar anderen zeggen dat het onmogelijk is, dat er geen opties meer zijn. Verder dan 'State of the art'..

Technology

Server
nginx

Registration

Registrar
Innerheight Internet Diensten B.V.
Created
2004-07-06
Updated
2021-03-15
Name servers
  • ns1.innerheight.com
  • ns3.innerheight.com

DNS records live

NS
  • ns1.innerheight.com
  • ns3.innerheight.com
MX
  • 10 mail.innerheight.com
TXT
  • google-site-verification=k-yF5gsvEHE2FjBjQs9VLPUFizZoQJ0y4xvvnuHz__4

Email authentication strong

SPF
v=spf1 ip4:185.73.32.14 ip4:185.73.32.3 ip6:2001:1af8:2100:b080:1::80 ip4:185.73.34.3 ip6:2a05:3f44::2:80 mx:innerheight.com ~all
softfail (~all)
DMARC
v=DMARC1; p=quarantine; rua=mailto:dmarc@underdark.nl; ruf=mailto:dmarc@underdark.nl; fo=1; pct=5
policy: quarantine · pct=5
DKIM
no key found at common selectors

Certificate (current)

R13
from 2026-05-08 to 2026-08-06
Expires in 79 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 90/100 Checked live page: https://underdark.nl/

present
  • strict-transport-security
  • content-security-policy
  • x-frame-options
  • x-content-type-options
  • referrer-policy
findings
  • CSP uses wildcard sources
  • missing Permissions Policy
Header values
referrer-policy
same-origin
x-frame-options
SAMEORIGIN
x-content-type-options
nosniff
content-security-policy
base-uri 'self';default-src 'none';object-src 'none';script-src 'self' https://css.underdark.nl https://piwik.underdark.nl https://api.tiles.mapbox.com https://api.mapbox.com;style-src 'self' https://css.underdark.nl https://api.tiles.mapbox.com;form-action 'self' https://customers.underdark.nl;connect-src 'self' https://api.mapbox.com https://*.tiles.mapbox.com https://events.mapbox.com;img-src 'self' data: blob: https://*.tiles.mapbox.com https://css.underdark.nl;font-src 'self' https://css.underdark.nl;frame-ancestors 'self'
strict-transport-security
max-age=31536000;

Links to (5)

Linked from (1)