SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
k-tecs.co.jp
SSL/TLS Certificate
SSL/TLS Certificate for k-tecs.co.jp
Self-signed- Issued by (CA)
- Hoge Hoge Company
- Subject
- dummy.domain
- Valid from
- Jun 5, 2017
- Valid until
- May 12, 2117 (33104 days remaining)
- Public key
- RSA 2048-bit
- Serial
- D0ADB0A4E97DFEB1
- SHA-256 fingerprint
- 19:65:C8:80:8B:9D:AE:44:49:C4:86:6D:34:61:34:EE:78:66:09:42:92:48:20:9A:36:7F:40:0F:F8:AD:D9:78
- Chain
- dummy.domain
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 Sep 17, 2026.
Never get surprised by k-tecs.co.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch k-tecs.co.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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