SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
geljon.nl
SSL/TLS Certificate
SSL/TLS Certificate for geljon.nl
Expired- Issued by (CA)
- Let's Encrypt
- Subject
- geljon.nl
- Valid from
- Apr 24, 2026
- Valid until
- Jul 23, 2026 (expired 27 days ago)
- Public key
- RSA 2048-bit
- Serial
- 06263589176DA26678D18242713AC99312E7
- SHA-256 fingerprint
- A9:94:BB:28:BD:28:95:37:E5:91:D0:EB:42:2E:A4:C0:EB:1D:56:20:2B:84:8D:97:FE:16:9E:45:C8:32:6B:5B
- Chain
- R13 → 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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