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 isamu-hosoda.jp

Valid
Issued by (CA)
Nijimo, Inc.
Subject
www.isamu-hosoda.jp
Valid from
Jun 19, 2026
Valid until
Jan 3, 2027 (142 days remaining)
Public key
RSA 2048-bit
Serial
85DF2AAB61CAB93EF377D66D42C2B8A4
SHA-256 fingerprint
E9:FA:25:0F:5B:A3:7F:94:56:61:5F:3D:0B:16:B3:0E:4E:44:52:1F:59:09:67:84:1E:1C:79:12:F4:73:7A:EF
Chain
FujiSSL RSA Domain Validation Secure Server CA 2 → Sectigo Public Server Authentication Root R46 → USERTrust RSA Certification Authority
Subject Alternative Names (2)
isamu-hosoda.jp, www.isamu-hosoda.jp

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 4, 2026.

Never get surprised by isamu-hosoda.jp's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch isamu-hosoda.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.

Monitor this certificate free

Free for your first domain: uptime, DNS, and certificate together. No credit card.