SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

ddm-master.de

SSL/TLS Certificate

WhoisRDAPDNS RecordsCertificateUptimeDiagnosticsHistoryHide Contact Info

SSL/TLS Certificate for ddm-master.de

Valid
Issued by (CA)
Hellenic Academic and Research Institutions CA
Subject
www.en.fh-potsdam.de
Valid from
Dec 6, 2025
Valid until
Dec 6, 2026 (109 days remaining)
Public key
EC 256-bit
Serial
784072A527A4CAF3411AAD111DD43DE8
SHA-256 fingerprint
39:48:CE:DA:7A:A0:80:26:E8:E4:6E:51:47:C2:F5:EA:66:78:AE:4E:96:D2:0F:07:A7:41:EE:06:6C:34:A1:5A
Chain
GEANT TLS ECC 1 → HARICA TLS ECC Root CA 2021
Subject Alternative Names (50)
*.applaus-potsdam.de, *.bibcamp.digital, *.blhp.de, *.brandenburg-digital.org, *.campus.fh-potsdam.de, *.ddm-master.de, *.diewissenschaftlerinnen.de, *.fh-potsdam.de, *.fh-potsdam.eu, *.fhp-campusambulanz.de, *.fhp.eu, *.habitatxchange.org, *.innowest-brandenburg.de, *.inspiredbymethod.com, *.laeneas-bildungsumwelten.de, *.noc.fh-potsdam.de, *.open-access-brandenburg.de, *.potsdam-uas.eu, *.streamsandtraces.com, *.urbane-zukunft.de, *.wetype.xyz, *.zukunftimgewerbehof.de, applaus-potsdam.de, bibcamp.digital, blhp.de, brandenburg-digital.org, climatescenario.org, climatescenarios.org, ddm-master.de, diewissenschaftlerinnen.de, fh-potsdam.de, fh-potsdam.eu, fhp-campusambulanz.de, fhp.eu, habitatxchange.org, innowest-brandenburg.de, inspiredbymethod.com, laeneas-bildungsumwelten.de, open-access-brandenburg.de, potsdam-uas.eu, streamsandtraces.com, urbane-zukunft.de, wetype.xyz, www.climatescenario.org, www.climatescenarios.org, www.de.fh-potsdam.de, www.design.fh-potsdam.de, www.en.fh-potsdam.de, www.furtherreading.fh-potsdam.de, zukunftimgewerbehof.de

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.

Never get surprised by ddm-master.de's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch ddm-master.de continuously, notifying you the moment anything moves across all three signals:

Uptime

We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.

DNS changes

We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.

TLS certificate

We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.

Monitor this certificate free

Free for your first domain: uptime, DNS, and certificate together. No credit card.