usabilityblog.de

Observed Jul 27, 2026, 15:18 UTC (6d ago). Every field below was attested with an Ed25519 signature at scan time. Catalog observation, re-checked on rotation - watch it for 5-minute checks.

Verify this receipt yourself + Watch this domain

Up right now

Secured bySectigo

1 subdomain · domcop

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

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

usabilityblog.de

A / AAAA

217.160.0.21

unattributedserves the site

ns1057.ui-dns.orgns1057.ui-dns.dens1057.ui-dns.bizns1057.ui-dns.com

ui-dns.org + ui-dns.de + moreanswers its DNS

mx00.ionos.demx01.ionos.de

ionos.dereceives its email

TLS

www.usabilityblog.de

Sectigo Limitedissued its certificate

DNS Records

A 1

217.160.0.21

MX 2

10mx00.ionos.de
10mx01.ionos.de

TXT 3

kJfLpWDXELbqfAFl7TAUngB0gCHWGz+36r3QF1n4MWo=
v=spf1 include:_spf-eu.ionos.com ~all
v=DMARC1; p=none;

NS 4

ns1057.ui-dns.org
ns1057.ui-dns.de
ns1057.ui-dns.biz
ns1057.ui-dns.com

SOA 1

ns1057.ui-dns.biz hostmaster.kundenserver.de

TLS Certificates (4)

Common Name	Issuer	Expires
`www.usabilityblog.de`	C=GB, O=Sectigo Limited, CN=Sectigo Public Server Authentication CA DV R36	Tue, 06 Oct 2026 23:59:59 +0000
`Sectigo Public Server Authentication CA DV R36`	C=GB, O=Sectigo Limited, CN=Sectigo Public Server Authentication Root R46	Fri, 21 Mar 2036 23:59:59 +0000
`Sectigo Public Server Authentication Root R46`	C=US, ST=New Jersey, L=Jersey City, O=The USERTRUST Network, CN=USERTrust RSA Certification Authority	Mon, 18 Jan 2038 23:59:59 +0000
`USERTrust RSA Certification Authority`	C=GB, ST=Greater Manchester, L=Salford, O=Comodo CA Limited, CN=AAA Certificate Services	Sun, 31 Dec 2028 23:59:59 +0000

Subdomains (1)

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

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

Ed25519 Receipt

Receipt ID: rcpt_17281d7008314405
Output Hash: 3f1676e63214c860d2e87eae31df859f670bf74294cffdf09707fbca59a1a3b6
Signature: ed25519:ded340e231bea6815503cc0eb27eefc3aef03b43f811090bd038c4b35863c3e693d72caead6e243d20bda5655448962163e97df6e57e01f6484fce79b7a3c401
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

Verify this in your browser

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