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 a-don.de
Valid- Issued by (CA)
- Google Trust Services
- Subject
- a-don.de
- Valid from
- Oct 4, 2026
- Valid until
- Jan 2, 2027 (59 days remaining)
- Public key
- EC 256-bit
- Serial
- 7AE40F10AEDC77F413F896629CB99A18
- SHA-256 fingerprint
- B7:83:CE:9C:41:02:DA:A4:53:DF:19:95:E2:2D:CA:89:7C:0F:E2:69:56:45:36:60:48:99:EB:69:D9:DC:C2:EF
- Chain
- WE1 → GTS Root R4
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
We've observed 1 previous certificate for this host. This certificate has been served since Sep 18, 2026.
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This is today's certificate. Turn on monitoring and we'll watch a-don.de continuously, notifying you the moment anything moves across all three signals:
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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