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 10-4.dk
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- 10-4.dk
- Valid from
- Aug 18, 2026
- Valid until
- Nov 16, 2026 (49 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05DDB8B63A9AE7D8E58DC70E9B006E2F4D0A
- SHA-256 fingerprint
- 5B:3B:7F:9A:6F:F0:42:27:CD:64:2D:FF:1A:48:A8:03:4C:3D:00:C5:5B:2C:D2:F3:5B:A7:FB:85:46:B7:F7:44
- Chain
- YR1 → 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 10-4.dk's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch 10-4.dk 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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