SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
bad-file.com
SSL/TLS Certificate
SSL/TLS Certificate for bad-file.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- bad-file.com
- Valid from
- Jul 19, 2026
- Valid until
- Oct 17, 2026 (42 days remaining)
- Public key
- EC 256-bit
- Serial
- 05773BE4819B6106C300F2266B429D9949F1
- SHA-256 fingerprint
- F8:6E:0A:09:95:10:90:B6:AC:10:ED:F5:C3:79:27:8A:B8:A4:14:FF:50:AF:7E:C8:C3:43:E3:1F:AD:0A:9A:2A
- Chain
- YE1 → Root YE → ISRG Root X2 → ISRG Root X1
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 26, 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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