Make sure the site responds over HTTPS with a valid certificate.
Page metadata (failed)
Add a <title> tag to the homepage.
Security headers (failed)
Add the HSTS, Content-Security-Policy, and X-Frame-Options response headers.
AboutUs has not vetted this site. Everything below is what we could measure automatically. Anything you do on the site — paying, sharing personal details, downloading — is between you and the site, not AboutUs.
Current facts
Latest available measurements; dated entries retain their dates. These are measurements, not an endorsement of the site.
not yet retrieved
Registrar and registration date not retrieved yet — we retry on every view.
We withhold an authority number until independent evidence (global rank, link-graph presence) has accrued. The facts we do have about this site are shown below — we'd rather say “not enough signals yet” than invent a low score.
Safety evidence
No unexpired threat-feed result; name-similarity check available (recorded about 78 days ago); 3/3 transport and email checks available (oldest recorded about 78 days ago). This is evidence coverage, not a probability that a website is safe.
No caution flags in the available scoring observations; this is not a complete safety assessment
Site history
Dated record — historical facts always carry their date.
No registration date on file yet. AboutUs reads it from RDAP when the site is checked.
AboutUs record
AboutUs wiki pageJun 21, 2006An AboutUs wiki page described t-systems.de from Jun 21, 2006 to Jun 21, 2006 (1 edit).Source: AboutUs wiki archive, 2006–2023Current AboutUs recordJul 18, 2026 – Aug 27, 2026 (latest)Authority and Safety last refreshed Aug 27, 2026.Source: AboutUs checks
Registrar
No registrar observed yet. AboutUs has recorded registrars since Jul 20, 2026.
Registrant
No registration-record history on file for this domain yet.
Zone file
No .de zone-file record for t-systems.de is shown here yet.
Certificate
Deutsche Telekom Security GmbHDeutsche Telekom Security GmbHFeb 12, 2026 – Nov 14, 2026 (latest)Deutsche Telekom Security GmbH issued 6 certificates for t-systems.de from Feb 12, 2026, the latest valid until Feb 21, 2027. Seen in use on Oct 9, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader); TLS check, Oct 9, 2026
2010201520202025Jan ’26Apr ’26Jul ’26← last 12 months, drawn wider
Every dated fact on this lifeline (4)
Jun 21, 2006AboutUs record: An AboutUs wiki page described t-systems.de from Jun 21, 2006 to Jun 21, 2006 (1 edit).Source: AboutUs wiki archive, 2006–2023
Feb 12, 2026 – Nov 14, 2026Certificate: Deutsche Telekom Security GmbH issued 6 certificates for t-systems.de from Feb 12, 2026, the latest valid until Feb 21, 2027. Seen in use on Oct 9, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader); TLS check, Oct 9, 2026
Mar 25, 2026 – Nov 14, 2026Certificate: Let's Encrypt issued 61 certificates for t-systems.de from Mar 25, 2026, the latest valid until Jan 23, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Jul 18, 2026 – Aug 27, 2026AboutUs record: Authority and Safety last refreshed Aug 27, 2026.Source: AboutUs checks
Let's Encrypt
Let's EncryptMar 25, 2026 – Nov 14, 2026Let's Encrypt issued 61 certificates for t-systems.de from Mar 25, 2026, the latest valid until Jan 23, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)