SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
kuru-nan.com
SSL/TLS Certificate
SSL/TLS Certificate for kuru-nan.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.takasaki-comic.jo-ji.jp
- Valid from
- Aug 24, 2026
- Valid until
- Nov 22, 2026 (50 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05C82CD3302BB816C8DCE0B9A431F842A21B
- SHA-256 fingerprint
- 6D:97:43:36:42:51:88:18:46:66:24:C6:F0:06:3D:47:C3:78:01:DF:47:49:95:38:3C:BC:59:99:38:B0:63:29
- 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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This is today's certificate. Turn on monitoring and we'll watch kuru-nan.com 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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