SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
um-service.de
SSL/TLS Certificate
SSL/TLS Certificate for um-service.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.um-service.de
- Valid from
- Oct 16, 2026
- Valid until
- Jan 14, 2027 (65 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 050D27366CA6B942C4ACF2CA97F4299BD883
- SHA-256 fingerprint
- B2:B8:25:4E:1A:9B:B4:24:65:FF:8E:DA:04:64:F4:27:49:ED:CB:61:5D:0E:4C:25:34:AA:DF:84:A1:FA:16:F4
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
This certificate has been served since Nov 10, 2026.
Never get surprised by um-service.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch um-service.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, 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.
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