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 hk-dragons.com

Expired
Issued by (CA)
Let's Encrypt
Subject
dragonstest.developmentprog.com
Valid from
Jan 22, 2026
Valid until
Apr 22, 2026 (expired 101 days ago)
Public key
RSA 2048-bit
Serial
0512C6F23EA508FCB11F09D2393F211AF480
SHA-256 fingerprint
60:83:06:0A:0E:4A:D3:D3:D4:E0:14:9B:C5:C7:0A:D7:8F:D6:D8:71:70:01:F6:F0:66:46:84:92:08:5C:80:5F
Chain
R12 → ISRG Root X1
Subject Alternative Names (1)
dragonstest.developmentprog.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 Jul 26, 2026.

Never get surprised by hk-dragons.com's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch hk-dragons.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.