SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
dirk-jan.com
SSL/TLS Certificate
SSL/TLS Certificate for dirk-jan.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- dirk-jan.com
- Valid from
- Sep 14, 2026
- Valid until
- Dec 13, 2026 (70 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06B5915D83B8BDED087A940BB5BCBEE85E13
- SHA-256 fingerprint
- C2:7B:FE:25:2F:A7:94:5E:55:A2:73:FA:44:91:0E:1D:E9:E7:18:42:45:66:71:3E:79:D0:8B:3B:88:08:6B:AB
- Chain
- YR2 → Root YR → 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 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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