SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

SSL/TLS Certificate for s-area.jp

Valid
Issued by (CA)
Let's Encrypt
Subject
s-area.jp
Valid from
Aug 26, 2026
Valid until
Nov 24, 2026 (82 days remaining)
Public key
RSA 2048-bit
Serial
06954918EEB44E830157944B200DB3F70E0E
SHA-256 fingerprint
CC:D8:6A:32:21:D3:B0:D7:0C:EF:FB:5F:07:8E:32:99:61:C6:68:67:5A:7E:E0:15:C0:EC:8C:E5:CF:E9:8F:52
Chain
YR2 → Root YR → ISRG Root X1
Subject Alternative Names (4)
cook.s-area.jp, diy.s-area.jp, s-area.jp, www.s-area.jp

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 s-area.jp 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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