SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
alexun.com
SSL/TLS Certificate
SSL/TLS Certificate for alexun.com
Untrusted chain- Issued by (CA)
- Let's Encrypt
- Subject
- alexun.com
- Valid from
- Aug 30, 2026
- Valid until
- Nov 28, 2026 (45 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 058B8489C9369769F5AF78C0A25B6F6A7BAD
- SHA-256 fingerprint
- 73:46:64:B7:07:11:7A:21:AA:54:10:0E:05:CF:E4:57:6D:CC:B9:19:8B:25:30:F2:FC:71:6B:59:06:88:D2:CE
- Chain
- YR1
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 21, 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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