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 as-dk.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- as-dk.de
- Valid from
- Jun 11, 2026
- Valid until
- Sep 9, 2026 (32 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 0507278701D3D534813B25B9F339CC9A71CB
- SHA-256 fingerprint
- 63:A7:E6:6F:28:2A:62:05:2E:2F:FF:47:DD:4F:6D:BD:F8:DF:3A:E2:BD:E3:3E:56:59:A7:00:4F:90:87:A2:06
- 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.
Never get surprised by as-dk.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch as-dk.de continuously, notifying you the moment anything moves across all three signals:
Uptime
We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.
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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