SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
j-alive.tokyo
SSL/TLS Certificate
SSL/TLS Certificate for j-alive.tokyo
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- j-alive.tokyo
- Valid from
- Oct 16, 2026
- Valid until
- Jan 14, 2027 (73 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 066BF611BE91E429577B985AEF82F84E24BC
- SHA-256 fingerprint
- E7:16:8B:88:74:DB:1B:1E:EA:60:31:6E:6E:26:80:3C:D8:74:35:B7:94:0E:47:62:91:08:5E:4F:80:DA:1B:0C
- 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.
Never get surprised by j-alive.tokyo's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch j-alive.tokyo 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, 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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