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 sp-model.jp

Valid
Issued by (CA)
Let's Encrypt
Subject
sp-model.jp
Valid from
Aug 10, 2026
Valid until
Nov 8, 2026 (43 days remaining)
Public key
RSA 2048-bit
Serial
05E7F35AD8551B98664C1040A622E1EAD47C
SHA-256 fingerprint
37:CE:47:72:55:96:D1:D4:DD:7D:16:BD:2F:4B:01:1C:5D:46:FB:3D:FD:79:76:22:FC:E3:9F:85:C7:6E:63:02
Chain
YR2 → Root YR → ISRG Root X1
Subject Alternative Names (2)
sp-model.jp, www.sp-model.jp

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 Aug 11, 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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