SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
momoya-gakuen.jp
SSL/TLS Certificate
SSL/TLS Certificate for momoya-gakuen.jp
Expiring soon- Issued by (CA)
- Let's Encrypt
- Subject
- momoya-gakuen.jp
- Valid from
- Apr 28, 2026
- Valid until
- Jul 27, 2026 (3 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 061BB1C60D47D665271C790861E1681AB55C
- SHA-256 fingerprint
- 28:38:3B:E7:23:69:AB:B3:A7:4E:58:A9:D6:C7:E6:F1:94:C7:37:9C:CC:91:75:C8:38:97:05:D4:22:7B:72:CA
- Chain
- R13 → 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, 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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