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 bf-a.dk
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- bf-a.dk
- Valid from
- Aug 11, 2026
- Valid until
- Nov 9, 2026 (39 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05F77C56A8D66A265200BA7938D207C03036
- SHA-256 fingerprint
- 9B:CD:AD:18:0D:F1:5E:23:13:98:07:AB:D7:A6:CD:17:06:97:4D:50:5E:D9:CC:7C:3C:9D:EF:D6:C6:B7:2B:65
- 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.
This certificate has been served since Sep 21, 2026.
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This is today's certificate. Turn on monitoring and we'll watch bf-a.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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