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 dualstack.net

Hostname mismatch
Issued by (CA)
Japan Registry Services Co., Ltd.
Subject
www.ginzado.ne.jp
Valid from
Jan 7, 2026
Valid until
Jan 31, 2027 (182 days remaining)
Public key
RSA 2048-bit
Serial
13543B5157515A5025109D0598094178
SHA-256 fingerprint
7D:A4:C2:EA:4A:B9:B4:E7:87:C5:48:75:C5:93:84:CF:7E:06:80:BF:E7:61:D6:7A:59:9E:94:09:78:D5:0D:5F
Chain
JPRS Domain Validation Authority - G4
Subject Alternative Names (2)
ginzado.ne.jp, www.ginzado.ne.jp

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 28, 2026.

Never get surprised by dualstack.net's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch dualstack.net 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.