SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
mr-johnsen.com
SSL/TLS Certificate
SSL/TLS Certificate for mr-johnsen.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- mr-johnsen.com
- Valid from
- Aug 4, 2026
- Valid until
- Nov 2, 2026 (43 days remaining)
- Public key
- EC 256-bit
- Serial
- 0660CD8EF19003228B21D5F5311D1A81B600
- SHA-256 fingerprint
- B0:CB:02:F6:BA:38:AE:0C:CE:09:AC:2D:2B:65:E3:D8:C4:6B:73:32:B5:DD:24:BB:27:4B:56:E5:36:41:FE:32
- Chain
- YE1 → Root YE → ISRG Root X2 → 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 8, 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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