SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
SSL/TLS Certificate for reisp.ch
Self-signed- Issued by (CA)
- reisp.ch.df-172816.dummy
- Subject
- reisp.ch.df-172816.dummy
- Valid from
- Sep 21, 2025
- Valid until
- Sep 21, 2026 (expired 44 days ago)
- Public key
- RSA 2048-bit
- Serial
- 4AAD0BFB
- SHA-256 fingerprint
- 4E:77:70:39:13:F2:BB:FE:C5:AC:A0:E5:6F:92:CF:3E:AB:2F:57:0B:26:E8:E1:1E:D4:75:A3:2F:CB:39:B5:CB
- Chain
- reisp.ch.df-172816.dummy
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 29, 2026.
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Uptime
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DNS changes
We watch NS, MX, CAA, CNAME, TXT 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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