SSL/TLS Certificate Lookup

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

SSL/TLS Certificate for udk-berlin.de

Valid
Issued by (CA)
Hellenic Academic and Research Institutions CA
Subject
*.udk-berlin.de
Valid from
Sep 24, 2026
Valid until
Apr 11, 2027 (159 days remaining)
Public key
RSA 4096-bit
Serial
1305E5AEF99349E8CCEE91AD32A69BAE
SHA-256 fingerprint
05:54:96:19:B7:27:22:4C:81:1C:45:F7:F0:FB:2E:08:29:D7:CF:6B:FC:A2:41:4D:5B:E4:08:AF:BA:0F:54:3B
Chain
GEANT TLS RSA 1 → HARICA TLS RSA Root CA 2021 → Hellenic Academic and Research Institutions RootCA 2015
Subject Alternative Names (57)
*.julius-stern-institut.de, *.klangkunstbuehne.de, *.max-rostal-competition.de, *.ub.udk-berlin.de, *.udk-berlin.de, *.udk.berlin, julius-stern-institut.de, klangkunstbuehne.de, max-rostal-competition.de, ub.udk-berlin.de, udk-berlin.de, udk.berlin, www.alumni.udk-berlin.de, www.arch.udk-berlin.de, www.archiv.udk-berlin.de, www.asimut.udk-berlin.de, www.bas.udk-berlin.de, www.betont.udk-berlin.de, www.bildende-kunst.udk-berlin.de, www.career.udk-berlin.de, www.careercenter.udk-berlin.de, www.darstellende-kunst.udk-berlin.de, www.digimedial.udk-berlin.de, www.fabulousfridays.udk-berlin.de, www.fam.udk-berlin.de, www.gestaltung.udk-berlin.de, www.gleichstellungspolitik.udk-berlin.de, www.gs.udk-berlin.de, www.gwk.udk-berlin.de, www.hyper3d.udk-berlin.de, www.interkulturelles-mentoring.udk-berlin.de, www.intern.udk-berlin.de, www.intern.udk.berlin, www.kunstimkontext.udk-berlin.de, www.kuwi.udk-berlin.de, www.label.udk-berlin.de, www.lehramt.udk-berlin.de, www.lehrevaluation.udk-berlin.de, www.livestream.udk-berlin.de, www.maerz.udk-berlin.de, www.mediahub.udk-berlin.de, www.mediathek.udk-berlin.de, www.mentoring.udk-berlin.de, www.musik.udk-berlin.de, www.musikpaedagogik.udk-berlin.de, www.musiktheorie.udk-berlin.de, www.musisch-aesthetische-erziehung.udk-berlin.de, www.oase.udk-berlin.de, www.oase.udk.berlin, www.portal.ub.udk-berlin.de, www.sdc.udk-berlin.de, www.studentsupport.udk-berlin.de, www.studium-generale.udk-berlin.de, www.theaterpaedagogik.udk-berlin.de, www.timeline.udk-berlin.de, www.voggs.udk-berlin.de, www.wearablecomputing.udk-berlin.de

Certificate Authority Authorization (CAA)

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

We've observed 1 previous certificate for this host. This certificate has been served since Oct 3, 2026.

Never get surprised by udk-berlin.de's certificate expiring

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

Certificate monitor showing the issuer, expiry date, chain status, fingerprint, covered names, and a history of a rotation and an expiry warning

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, CNAME, TXT 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.