iwkoeln.de

Observed Jul 18, 2026, 20:19 UTC (2d ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onCloudflare

Email bySendGrid

Also usesGoogle Search ConsoleAtlassian

7 subdomains · tranco_100k

Every line above is a signed observation. Check the math at the bottom of the page.

INFRASTRUCTURE MAPwhat iwkoeln.de actually stands on - every host below is a signed observation

iwkoeln.de

A / AAAA

78.47.106.28

Cloudflareserves the site

ns28.domaincontrol.comns27.domaincontrol.com

domaincontrol.comanswers its DNS

mx3.mas.t-systems-service.commx2.mas.t-systems-service.commx1.mas.t-systems-service.com

SendGridreceives its email

HTTPS probe

redirect Redirecting (3xx) 301 → https://www.iwkoeln.de/

HTTP status301

Servercloudflare

TLS protocolHTTP/2

TLS issuernot observed

Behind Cloudflareyes

Response time510 ms

DNS resolutionNOERROR

Redirect chain

https://www.iwkoeln.de/

Every field above is part of the same signed observation as the records below. Blank means not observed, never "none".

DNS Records

A 1

78.47.106.28

MX 3

30mx3.mas.t-systems-service.com
20mx2.mas.t-systems-service.com
10mx1.mas.t-systems-service.com

TXT 10

v=spf1 a:spf.mas.t-systems-service.com a:k60828.coveto.de include:spf.mailjet.com ip4:87.79.12.44 ip4:87.79.12.45 ip4:89.1.85.243 ip4:176.9.21.28 ip4:212.114.35.242 ip4:212.114.34.232 ip4:212.114.34.50 ip4:212.114.35.226 ip4:85.13.129.239 ip4:172.16.244.130 ip4:87.79.12.40 ip4:172.16.244.15 ip4:79.142.32.16 include:sendgrid.net include:spf.protection.outlook.com include:spf.crsend.com include:_spf.recruiting-portal.com include:spf.orbit.teamleader.eu -all
google-site-verification=vwZaS5UefEAQ3Tsxbh_CqJPxhoE0VT2L3HwFQc4C_9U
X/ZeVzL7IhK6TSKlO3Kw3dug2Xzslbq2WdKEa/2YtkYYx4aOqWOs+yQo21J4TcOFuoI5xwPERNtZXDojla+rQw==
DBDAA6EF044D9C98596D5E19F0A712E66805CC23
apple-domain-verification=tGiIYiXI0xJvPAfO
201712141416045uyjvkj5xn41l2usoc381vrf7d3xz85whzsn1v3kqpsra7fqkk
linkedin-site-verification=351659d6-e7ea-4a8a-b732-7fa4481f4a93
langdock-verify=vBbNAT2zZTpb6vQEW3i-00g2sRoRrTr7MbuVw7J8PWk
atlassian-domain-verification=uPRmh1XxvV032a8zKbaxvNI0ZnojyP6cXHYoYFCTHaM9sPli8fciIsGXz6yBzz1t
v=DMARC1; p=none; pct=100; rua=mailto:dmarc@iwkoeln.de; ruf=mailto:dmarc@iwkoeln.de; fo=1

NS 2

ns28.domaincontrol.com
ns27.domaincontrol.com

SOA 1

ns27.domaincontrol.com dns.jomax.net

TLS Certificates (0)

None.

Subdomains (7)

The proof

Signed at scan time. Check the math yourself. Every line above is part of one signed observation. Re-hash it and check the Ed25519 signature in your own browser; nothing leaves your machine.

Verify this receipt

Put the receipt on your own site. A live badge showing what DomainDrift observes and signs for iwkoeln.de. It updates itself. It attests a signed observation - not that the site is safe.

<a href="https://domaindrift.io/t/iwkoeln.de">
  <img src="https://domaindrift.io/badge/iwkoeln.de.svg"
       width="300" height="64" alt="DomainDrift signed observations for iwkoeln.de">
</a>

Ed25519 Receipt

Receipt ID: 73bc7492-0ede-417b-ad26-32efbeda3a98
Output Hash: 3393889002e511df099a095a01891c6d79bcaa2e23a68dff242f03aaf6451377
Signature: ed25519:647a06fd1196236ff4209a669fde3d2335dff470b510b7f7b5e313cf8b0e05b66e72d8773932f8ee5fd4c7715d8eef3422ac536f4442bf83c5471015765b5b01
Public Key: ed25519:7aad40f2d6399c207fe2fc15aade04a78324787a355d36725cc90687f9e10cff
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/iwkoeln.de