SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
karuizawa-pension.com
SSL/TLS Certificate
SSL/TLS Certificate for karuizawa-pension.com
Untrusted chain- Issued by (CA)
- Nijimo, Inc.
- Subject
- www.karuizawa-pension.com
- Valid from
- May 20, 2026
- Valid until
- Dec 4, 2026 (110 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 7EC51109AE46C580615297057D14445F
- SHA-256 fingerprint
- B9:F2:B4:80:90:99:04:B9:F3:1E:16:80:C3:41:B3:16:07:F6:FA:87:57:F6:7F:07:7D:5D:73:9D:A9:5A:27:6F
- Chain
- —
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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