SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
o-kanagawa.com
SSL/TLS Certificate
SSL/TLS Certificate for o-kanagawa.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- o-kanagawa.com
- Valid from
- Jun 20, 2026
- Valid until
- Sep 18, 2026 (35 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05B81A520A10989158F8E7333DB8C2BF17F2
- SHA-256 fingerprint
- 68:95:F8:19:9B:FA:6F:86:37:0F:10:4F:C4:0B:14:05:9B:00:F3:04:66:C5:64:53:90:EB:3A:01:B5:E1:07:DD
- 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.
This certificate has been served since Aug 5, 2026.
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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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