SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
optemus-tech.com
SSL/TLS Certificate
SSL/TLS Certificate for optemus-tech.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- optemus-tech.com
- Valid from
- Sep 28, 2026
- Valid until
- Dec 27, 2026 (78 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0505B624E35F9EAF0CD9123E59FFC9914B4E
- SHA-256 fingerprint
- A0:B8:85:76:BA:03:0E:BC:DD:02:87:CE:E0:0D:72:98:79:E2:B0:87:03:83:93:69:F8:AD:BE:4C:80:F7:79:CD
- 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.
Never get surprised by optemus-tech.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch optemus-tech.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.
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