SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
extech.com
SSL/TLS Certificate
SSL/TLS Certificate for extech.com
Valid- Issued by (CA)
- Google Trust Services
- Subject
- extech.com
- Valid from
- Sep 18, 2026
- Valid until
- Dec 17, 2026 (60 days remaining)
- Public key
- EC 256-bit
- Serial
- AE1A24C72DE423850E3BF9653AC7BD87
- SHA-256 fingerprint
- BB:78:C3:FD:14:0A:15:E5:04:C7:FF:8A:BC:6E:95:6C:CD:9E:45:4F:DF:A1:A1:C6:1C:F6:AD:9D:F8:03:D0:B9
- Chain
- WE1 → GTS Root R4
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 Oct 2, 2026.
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Uptime
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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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