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 nk-s.dk
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- nk-s.dk
- Valid from
- Jul 14, 2026
- Valid until
- Oct 12, 2026 (51 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 051E6E492D153376445E5608D62AD8FC8E4E
- SHA-256 fingerprint
- 37:11:43:10:A3:65:B4:C0:9A:D9:CE:6F:37:F6:35:3B:1D:49:D7:B9:DE:91:99:A4:17:85:29:65:3A:DA:D5:1D
- 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 nk-s.dk's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch nk-s.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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