SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
jas-geist.com
SSL/TLS Certificate
SSL/TLS Certificate for jas-geist.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- jas-geist.de
- Valid from
- Aug 9, 2026
- Valid until
- Nov 7, 2026 (30 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 055693F9E6167A6277122DBDF31280A54910
- SHA-256 fingerprint
- 7E:05:64:7B:EA:53:A9:FF:90:08:D5:55:E6:14:E1:D7:1B:3F:4E:C4:72:11:62:27:A0:F5:5A:5B:77:65:9C:BB
- 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 Oct 3, 2026.
Never get surprised by jas-geist.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch jas-geist.com 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.