SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
optik-a.net
SSL/TLS Certificate
SSL/TLS Certificate for optik-a.net
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- optik-a.net
- Valid from
- Jul 28, 2026
- Valid until
- Oct 26, 2026 (76 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0614BA65DFF01E468246E86DCB79E0F14EF8
- SHA-256 fingerprint
- 99:4C:1B:DD:4A:20:42:EE:91:5E:8B:ED:37:AA:5E:66:52:7B:CA:01:18:98:9C:C5:5B:9B:6C:E1:3F:EF:5B:5F
- 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 Aug 5, 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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