SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
d-tech.it
SSL/TLS Certificate
SSL/TLS Certificate for d-tech.it
Hostname mismatch- Issued by (CA)
- Let's Encrypt
- Subject
- www.opentothesea.net
- Valid from
- Jul 24, 2026
- Valid until
- Oct 22, 2026 (30 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 059DAFAB85306D31A3DFC7C27F3ADA38EC3D
- SHA-256 fingerprint
- 37:B8:18:84:69:E7:DE:75:91:86:62:77:BC:49:29:A2:30:9A:68:1E:3E:8F:57:9A:2F:8B:4B:FC:93:6E:62:6F
- 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.
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This is today's certificate. Turn on monitoring and we'll watch d-tech.it continuously, notifying you the moment anything moves across all three signals:
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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