SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
so-you.or.jp
SSL/TLS Certificate
SSL/TLS Certificate for so-you.or.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- so-you.or.jp
- Valid from
- Aug 2, 2026
- Valid until
- Oct 31, 2026 (51 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06D7EBD5E5A75170EBA5E8BAE2B43B3E128C
- SHA-256 fingerprint
- EB:D1:4D:12:8B:26:25:C2:AD:08:2E:CB:5B:91:E1:D9:43:5D:19:7D:0C:C0:9B:E1:8D:BD:5A:D9:35:8A:66:A9
- Chain
- YR1 → Root YR → ISRG Root X1
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 8, 2026.
Never get surprised by so-you.or.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch so-you.or.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.
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