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 u-t-g.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- u-t-g.de
- Valid from
- Aug 15, 2026
- Valid until
- Nov 13, 2026 (38 days remaining)
- Public key
- EC 256-bit
- Serial
- 05C43B09001BD4C7E2E83E7D3561F4E7442C
- SHA-256 fingerprint
- EF:BF:9D:86:BA:70:CD:A6:21:CB:C3:6F:C7:96:71:38:BA:3E:29:F8:CC:49:0D:B8:91:64:CE:36:41:09:BB:E0
- Chain
- YE1 → Root YE → ISRG Root X2 → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by u-t-g.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch u-t-g.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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.