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 aoyama-kougyou.com

Expiring soon
Issued by (CA)
Japan Registry Services Co., Ltd.
Subject
www.aoyama-kougyou.com
Valid from
Nov 20, 2025
Valid until
Nov 30, 2026 (21 days remaining)
Public key
RSA 2048-bit
Serial
72144D84B4D3EB9DBD93AEC1C3B62371
SHA-256 fingerprint
6E:F9:D2:8E:E4:79:9E:C8:DE:68:AB:C6:63:CF:5F:A6:41:11:4C:50:CF:2E:BC:65:78:8C:3B:A6:8E:A6:FF:D2
Chain
JPRS Domain Validation Authority - G4
Subject Alternative Names (2)
aoyama-kougyou.com, www.aoyama-kougyou.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 Nov 3, 2026.

Never get surprised by aoyama-kougyou.com's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch aoyama-kougyou.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.