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 san-o.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- san-o.jp
- Valid from
- Nov 8, 2026
- Valid until
- Feb 6, 2027 (87 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05FC9E8ECC45D6BB2266BD8D08D1980400B4
- SHA-256 fingerprint
- A6:A7:3C:87:39:B7:71:E6:0A:E1:EB:99:3A:73:B8:AC:54:4A:CF:3D:CA:25:6D:D7:9D:57:E7:39:BE:0A:0D:EA
- Chain
- YR2 → 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 Oct 31, 2026.
Never get surprised by san-o.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch san-o.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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