SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

143-42-20-87.ip.linodeusercontent.com

SSL/TLS Certificate

SSL/TLS Certificate for 143-42-20-87.ip.linodeusercontent.com

Hostname mismatch
Issued by (CA)
Let's Encrypt
Subject
sonatevej.dk
Valid from
Jun 19, 2026
Valid until
Sep 17, 2026 (37 days remaining)
Public key
EC 256-bit
Serial
05AA66DD5E209B32C865E8539A938D9FCA5A
SHA-256 fingerprint
15:3F:56:8C:B6:0B:20:27:D3:E9:7F:C3:CB:DD:89:19:35:5B:21:FB:3C:FC:92:2B:B1:76:BC:19:2F:50:2C:31
Chain
YE2 → Root YE → ISRG Root X2 → ISRG Root X1
Subject Alternative Names (1)
sonatevej.dk

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.

Never get surprised by 143-42-20-87.ip.linodeusercontent.com's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch 143-42-20-87.ip.linodeusercontent.com 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.

Monitor this certificate free

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