SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
osa-tec.com
SSL/TLS Certificate
SSL/TLS Certificate for osa-tec.com
Valid- Issued by (CA)
- Sectigo Limited
- Subject
- *.osa-tec.com
- Valid from
- Jun 5, 2026
- Valid until
- Dec 16, 2026 (80 days remaining)
- Public key
- RSA 2048-bit
- Serial
- E6311CE232FF08AC12A3E9E8E7DC2960
- SHA-256 fingerprint
- EB:7F:5E:83:0E:DD:AB:C2:43:A4:56:52:8B:06:4B:BA:09:BB:81:BD:C6:A8:7D:14:A9:58:10:DF:78:90:8B:2D
- Chain
- Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46 → USERTrust RSA Certification Authority
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 Sep 23, 2026.
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Uptime
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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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