SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
yokokawa-shika.com
SSL/TLS Certificate
SSL/TLS Certificate for yokokawa-shika.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- yokokawa-shika.com
- Valid from
- Sep 29, 2026
- Valid until
- Dec 28, 2026 (71 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05BBA02174049B9D6CA760A04FFB63687060
- SHA-256 fingerprint
- 28:78:5E:51:19:59:69:3B:69:2A:E8:70:6A:AD:3A:A9:C5:36:2E:4B:75:B7:67:1E:2E:49:D5:70:71:A7:EC:C9
- 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.
We've observed 1 previous certificate for this host. This certificate has been served since Oct 9, 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, CNAME, TXT 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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