SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
sg-sechtem1971.de
SSL/TLS Certificate
SSL/TLS Certificate for sg-sechtem1971.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- sg-sechtem1971.de
- Valid from
- Oct 14, 2026
- Valid until
- Jan 12, 2027 (67 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 061AF9ADE7C8345BBA4C71F108B27BA9F4FF
- SHA-256 fingerprint
- 08:1E:43:AC:7D:29:04:2C:FB:CA:43:CA:F2:94:92:49:D8:DD:22:FB:4B:63:4B:67:90:CA:07:B5:70:11:A0:F8
- 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 1, 2026.
Never get surprised by sg-sechtem1971.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch sg-sechtem1971.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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.