SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ueda-shakyo.or.jp
SSL/TLS Certificate
SSL/TLS Certificate for ueda-shakyo.or.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- ueda-shakyo.or.jp
- Valid from
- Sep 27, 2026
- Valid until
- Dec 26, 2026 (41 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0690B1009FD17A6337AECE879D2DA6C62588
- SHA-256 fingerprint
- F2:30:04:04:2C:28:C7:3D:A7:32:D4:C5:66:74:37:89:0B:7A:46:F0:79:DA:C5:A5:36:BD:26:B3:F0:7E:6D:D0
- 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.
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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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