SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
know-wave.com
SSL/TLS Certificate
SSL/TLS Certificate for know-wave.com
Expired- Issued by (CA)
- Let's Encrypt
- Subject
- know-wave.com
- Valid from
- Apr 24, 2025
- Valid until
- Jul 23, 2025 (expired 387 days ago)
- Public key
- RSA 2048-bit
- Serial
- 05729DD9D9ABA2918A7CBBAB3579067E235A
- SHA-256 fingerprint
- E3:02:4E:F7:DB:7F:4D:9F:5E:0B:79:7A:A0:92:7E:CE:EC:E2:4F:87:55:03:4B:1F:FE:D4:1C:35:E9:6A:A5:AE
- Chain
- R11 → 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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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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