SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
hit-t-mark.jp
SSL/TLS Certificate
SSL/TLS Certificate for hit-t-mark.jp
Valid- Issued by (CA)
- Amazon
- Subject
- hit-t-mark.jp
- Valid from
- Aug 6, 2026
- Valid until
- Feb 19, 2027 (111 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 03F462162D52AA2912411A1DB4ED8C32
- SHA-256 fingerprint
- D1:6A:76:68:E8:C9:17:91:BD:95:79:9B:F7:14:D5:D2:C0:30:12:16:6F:28:C7:1D:54:F1:38:9D:85:EA:B2:DC
- Chain
- Amazon RSA 2048 M01 → Amazon Root CA 1 → Starfield Services Root Certificate Authority - G2
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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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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