SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
gigatek-inc.com
SSL/TLS Certificate
SSL/TLS Certificate for gigatek-inc.com
Hostname mismatch- Issued by (CA)
- ZeroSSL GmbH
- Subject
- *.gigatms.com.tw
- Valid from
- Apr 15, 2026
- Valid until
- Oct 30, 2026 (98 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 7B04C0B796939C903BC1FBA9C060ADA2
- SHA-256 fingerprint
- A0:F5:81:7E:04:3B:5E:D1:66:9B:30:78:8B:C6:2C:57:93:23:91:B7:E5:59:06:15:34:A5:AF:8D:8B:B9:DE:2D
- Chain
- ZeroSSL RSA DV SSL CA 2 → Sectigo Public Server Authentication Root R46
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 Jul 21, 2026.
Never get surprised by gigatek-inc.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch gigatek-inc.com 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.