SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
u-block.it
SSL/TLS Certificate
SSL/TLS Certificate for u-block.it
Valid- Issued by (CA)
- Actalis S.p.A.
- Subject
- *.u-block.it
- Valid from
- Aug 5, 2026
- Valid until
- Feb 20, 2027 (146 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 1DBFD03FDBDAB3F79099860E1C36509D
- SHA-256 fingerprint
- B1:9D:87:2E:81:D2:8A:BD:52:02:47:89:E6:F2:B9:F7:B7:43:06:9E:C3:DC:B0:AD:9F:B1:DD:2B:57:29:64:CE
- Chain
- Actalis Domain Validated TLS Server RSA CA 2025 → Actalis TLS Server RSA Root CA 2025 → Actalis Authentication Root CA
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 Jul 20, 2026.
Never get surprised by u-block.it's certificate expiring
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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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