SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
dia-star.com
SSL/TLS Certificate
SSL/TLS Certificate for dia-star.com
Valid- Issued by (CA)
- ZeroSSL GmbH
- Subject
- dia-star.com
- Valid from
- Aug 25, 2026
- Valid until
- Nov 23, 2026 (53 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 6B9D06369950813D767B6A108F990EF1
- SHA-256 fingerprint
- C8:D5:F6:F2:B2:C1:6B:83:69:B5:F3:13:52:F3:A2:78:04:AB:6E:87:41:8D:0E:7E:0A:F7:06:05:62:B8:E3:5D
- Chain
- ZeroSSL RSA DV SSL CA 2 → 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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This is today's certificate. Turn on monitoring and we'll watch dia-star.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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