SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
sayada-e.ed.jp
SSL/TLS Certificate
SSL/TLS Certificate for sayada-e.ed.jp
Valid- Issued by (CA)
- Japan Registry Services Co., Ltd.
- Subject
- www.sayada-e.ed.jp
- Valid from
- Aug 5, 2026
- Valid until
- Jan 31, 2027 (128 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 5C942E20E8EA7DA9C37B0CB297C7FEC0
- SHA-256 fingerprint
- 86:6F:EC:26:0A:AA:EF:83:C6:7D:BE:6D:3B:1A:08:7E:1B:04:53:7E:2C:25:FD:5C:54:3F:19:62:67:AD:63:38
- 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 11, 2026.
Never get surprised by sayada-e.ed.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch sayada-e.ed.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, 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.