SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
lucia-ah.jp
SSL/TLS Certificate
SSL/TLS Certificate for lucia-ah.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- lucia-ah.jp
- Valid from
- Jul 31, 2026
- Valid until
- Oct 29, 2026 (72 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 055E6148225952654E018B1E551749A28564
- SHA-256 fingerprint
- 55:38:1A:58:2B:04:6B:B6:B1:BB:2B:88:80:A6:C3:71:48:43:B6:E9:23:18:5A:2A:2F:FE:8A:BC:D7:97:EA: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.
Never get surprised by lucia-ah.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch lucia-ah.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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