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 with-kobe.or.jp

Valid
Issued by (CA)
Japan Registry Services Co., Ltd.
Subject
www.with-kobe.or.jp
Valid from
Dec 5, 2025
Valid until
Dec 31, 2026 (48 days remaining)
Public key
RSA 2048-bit
Serial
536A6D17D2A4DE793111EAF5E7BC7DCB
SHA-256 fingerprint
56:75:F8:75:50:1A:6D:4A:F3:79:17:0B:9D:59:F5:11:C4:DF:F8:49:06:02:DE:35:9C:31:38:B6:DF:9D:9E:B0
Chain
JPRS Domain Validation Authority - G4
Subject Alternative Names (2)
with-kobe.or.jp, www.with-kobe.or.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 Oct 30, 2026.

Never get surprised by with-kobe.or.jp's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch with-kobe.or.jp 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.