SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
otto-safe.jp
SSL/TLS Certificate
SSL/TLS Certificate for otto-safe.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- otto-safe.jp
- Valid from
- Jul 14, 2026
- Valid until
- Oct 12, 2026 (79 days remaining)
- Public key
- EC 256-bit
- Serial
- 052CEEDB3682F11C09B1435C15F5F02A3DA7
- SHA-256 fingerprint
- C3:26:8A:18:94:93:35:22:F3:76:A0:4C:0C:92:44:30:02:9F:DA:DF:49:AF:B2:F6:DD:61:DD:A2:A4:87:14:5C
- Chain
- YE2 → Root YE → ISRG Root X2 → 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 otto-safe.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch otto-safe.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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