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 slate-server.com

Hostname mismatch
Issued by (CA)
DigiCert Inc
Subject
slate.secure-host.com
Valid from
Jul 21, 2026
Valid until
Feb 4, 2027 (121 days remaining)
Public key
RSA 2048-bit
Serial
03D6484CD8D31067118541575EC3CD3A
SHA-256 fingerprint
54:0B:AF:83:30:0B:CF:04:F6:D0:1D:6A:F4:2E:DD:F6:83:0A:95:26:D8:9C:A3:3F:0B:D2:3C:59:08:91:E1:70
Chain
RapidSSL TLS RSA CA G1 → DigiCert Global Root G2
Subject Alternative Names (2)
slate.secure-host.com, www.slate.secure-host.com

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 28, 2026.

Never get surprised by slate-server.com's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch slate-server.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.