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 t-tec.jp
Valid- Issued by (CA)
- Google Trust Services
- Subject
- t-tec.jp
- Valid from
- Aug 20, 2026
- Valid until
- Nov 18, 2026 (69 days remaining)
- Public key
- EC 256-bit
- Serial
- ED809D99480EA0011325F373210F5AA6
- SHA-256 fingerprint
- 56:FD:9B:EB:DE:51:E5:F0:8F:22:6E:70:EF:D6:00:B6:A5:85:AC:9E:0A:F7:46:2C:10:12:1C:B7:D8:73:77:C0
- Chain
- WE1 → GTS Root R4
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by t-tec.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch t-tec.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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