SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
lenovo-ts.com
SSL/TLS Certificate
SSL/TLS Certificate for lenovo-ts.com
Expired- Issued by (CA)
- Let's Encrypt
- Subject
- ftp.lenovo-ts.com
- Valid from
- Jul 14, 2025
- Valid until
- Oct 12, 2025 (expired 295 days ago)
- Public key
- RSA 2048-bit
- Serial
- 059ACF89FF218BCD20C85FADE1556570D86B
- SHA-256 fingerprint
- FB:6F:F9:A9:09:BF:DE:52:A0:58:CF:33:15:CA:CC:D4:92:77:0C:7E:58:C5:15:09:B5:E4:47:05:BF:5E:80:96
- Chain
- R11 → 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 Aug 2, 2026.
Never get surprised by lenovo-ts.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch lenovo-ts.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.