SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
osa-official.com
SSL/TLS Certificate
SSL/TLS Certificate for osa-official.com
Valid- Issued by (CA)
- Actalis S.p.A.
- Subject
- *.osa-official.com
- Valid from
- Aug 4, 2026
- Valid until
- Feb 19, 2027 (169 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 7ED7E301682B76592A904158097B01C4
- SHA-256 fingerprint
- 97:30:0C:84:A5:50:5B:45:E6:F8:48:4D:18:49:A8:EC:7D:7A:7F:F0:9C:B1:31:F0:6E:2D:5E:40:6D:E2:FA:56
- 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.
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This is today's certificate. Turn on monitoring and we'll watch osa-official.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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