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 aalborg-sejlklub.dk

Valid
Issued by (CA)
Let's Encrypt
Subject
aalborg-sejlklub.dk
Valid from
Nov 8, 2026
Valid until
Feb 6, 2027 (87 days remaining)
Public key
RSA 2048-bit
Serial
06C05E2D1208AD42C96CCA4A0679F0644F98
SHA-256 fingerprint
18:2A:B6:0A:2A:84:F8:B5:01:88:BD:23:EC:AE:7A:40:09:1B:85:40:CE:84:28:73:03:39:76:25:A6:7B:3C:24
Chain
YR1 → Root YR → ISRG Root X1
Subject Alternative Names (4)
aalborg-sejlklub.dk, aalborgsejlklub.dk, www.aalborg-sejlklub.dk, www.aalborgsejlklub.dk

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 Oct 28, 2026.

Never get surprised by aalborg-sejlklub.dk's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch aalborg-sejlklub.dk continuously, notifying you the moment anything moves across all three signals:

Certificate monitor showing the issuer, expiry date, chain status, fingerprint, covered names, and a history of a rotation and an expiry warning

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, 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.

Monitor this certificate free

Free for your first domain: uptime, DNS, and certificate together. No credit card.