SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ok-patent.com
SSL/TLS Certificate
SSL/TLS Certificate for ok-patent.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- ok-patent.com
- Valid from
- Oct 14, 2026
- Valid until
- Jan 12, 2027 (58 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05F2F711F8A108E0C9BC841106E8AFE50E91
- SHA-256 fingerprint
- 01:4C:ED:32:C0:1B:18:81:EC:06:FC:B1:42:46:68:84:8A:21:63:17:C9:3B:BE:38:8C:B1:E0:D1:65:E4:A4:55
- 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 2, 2026.
Never get surprised by ok-patent.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ok-patent.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, 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.