SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
tec-oz.com
SSL/TLS Certificate
SSL/TLS Certificate for tec-oz.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- autodiscover.tec-oz.com
- Valid from
- Nov 2, 2026
- Valid until
- Jan 31, 2027 (85 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05829ADCBAE86568F4130C0D2903694EEA90
- SHA-256 fingerprint
- AB:89:14:B7:0D:F7:53:1C:1B:0D:61:F6:45:6A:56:F0:B0:85:73:E8:47:4B:48:1F:C7:16:CE:F3:71:45:FF:F7
- Chain
- YR1 → Root YR → ISRG Root X1
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 8, 2026.
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Uptime
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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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