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 li1708-20.members.linode.com

Self-signed
Issued by (CA)
SomeOrganization
Subject
li1708-20.members.linode.com
Valid from
Sep 21, 2020
Valid until
Sep 21, 2021 (expired 1874 days ago)
Public key
RSA 2048-bit
Serial
646A
SHA-256 fingerprint
1B:3A:EE:1E:33:DB:53:A9:A7:BC:33:88:3B:22:A4:9B:EB:69:FA:A6:30:19:4F:52:50:02:DD:22:20:79:85:C7
Chain
—

Certificate Authority Authorization (CAA)

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

Never get surprised by li1708-20.members.linode.com's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch li1708-20.members.linode.com 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.