SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
s-kotobuki.co.jp
SSL/TLS Certificate
SSL/TLS Certificate for s-kotobuki.co.jp
Valid- Issued by (CA)
- Japan Registry Services Co., Ltd.
- Subject
- www.s-kotobuki.co.jp
- Valid from
- Oct 8, 2026
- Valid until
- Jan 4, 2027 (54 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 2362D665B47A6E61D7B7EA409B764132
- SHA-256 fingerprint
- 88:DD:29:FB:9A:AD:38:AE:5F:2D:88:3C:0E:94:10:F8:1A:A6:DE:65:85:1D:40:8D:C0:EE:73:DE:43:7E:15:34
- Chain
- JPRS DV RSA CA 2024 G1 → SECOM TLS RSA Root CA 2024
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 21, 2026.
Never get surprised by s-kotobuki.co.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch s-kotobuki.co.jp 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, 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.
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