netcologne.de

Observed Jul 18, 2026, 12:56 UTC (13h ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onNetCologne Gesellschaft fur Telekommunikation mbH

Secured byLet's Encrypt

Also usesMiroGoogle Search Console

IPv6 · 1 subdomain · tranco_10k

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

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

netcologne.de

A / AAAA

213.168.87.272001:4dd0:100:1f00:80:0:12:5

NetCologne Gesellschaft fur Telekommunikation mbHserves the site

dns.techfak.netpns.dtag.dedns-ext.netcologne.dens1.netcologne.de+1 more

techfak.net + dtag.de + moreanswers its DNS

cc-mx3.netcologne.decc-mx1.netcologne.decc-mx2.netcologne.decc-mx4.netcologne.de

netcologne.dereceives its email

TLS

netcologne.de

Let's Encryptissued its certificate

DNS Records

A 1

213.168.87.27

AAAA 1

2001:4dd0:100:1f00:80:0:12:5

MX 4

10cc-mx3.netcologne.de
10cc-mx1.netcologne.de
10cc-mx2.netcologne.de
10cc-mx4.netcologne.de

TXT 5

MS=BDFD7A5ADE83C86F97DF75FD37738FB8BAC068A5
v=spf1 ip4:89.1.8.0/23 ip6:2001:4dd0:100::/48 ip4:194.8.194.0/24 ip4:81.173.193.0/24 ip4:81.173.194.0/26 ip4:81.173.246.0/24 ip4:185.98.184.0/24 ip4:80.82.206.0/26 ip4:46.228.134.9/32 ip4:62.146.4.26/32 include:spf.pressfile.de ~all
miro-verification=ad0fc33f95902a578bdf8a8403984837bce5736f
google-site-verification=5kVCnNbyhYJeE2zfu4UkCKDluoazefAJCpUY357KK2M
v=DMARC1; p=none; sp=none; fo=1; adkim=r; aspf=r; ruf=mailto:dmarcfor@netcologne.de; rua=mailto:dmarcrec@netcologne.de

NS 5

dns.techfak.net
pns.dtag.de
dns-ext.netcologne.de
ns1.netcologne.de
ns3.netcologne.de

SOA 1

ns1.netcologne.de hostmaster.netcologne.de

TLS Certificates (4)

Common Name	Issuer	Expires
`netcologne.de`	C=US, O=Let's Encrypt, CN=YE2	Sat, 10 Oct 2026 07:02:26 +0000
`YE2`	C=US, O=ISRG, CN=Root YE	Sat, 02 Sep 2028 23:59:59 +0000
`Root YE`	C=US, O=Internet Security Research Group, CN=ISRG Root X2	Thu, 02 Sep 2032 23:59:59 +0000
`ISRG Root X2`	C=US, O=Internet Security Research Group, CN=ISRG Root X1	Thu, 02 Sep 2032 23:59:59 +0000

Subdomains (1)

www.netcologne.de

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 netcologne.de. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: f2cbba6c-ec47-4f0f-983f-1efff0ee37c5
Output Hash: 0499ff349ac62009e5187d67cf58d1efae047892ea5abb69240ade40e0e22366
Signature: ed25519:cb9e656475be716c9a090d86ea826fb7000b33aa917351eb66c6185d93d682758ea8258a02023e91c9ab482370efe9c27c32f7fe6483221581766dfd68eab705
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

Verify this in your browser

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