SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ian-johnson.com
SSL/TLS Certificate
SSL/TLS Certificate for ian-johnson.com
Valid- Issued by (CA)
- Google Trust Services
- Subject
- ian-johnson.com
- Valid from
- Sep 5, 2026
- Valid until
- Dec 4, 2026 (89 days remaining)
- Public key
- EC 256-bit
- Serial
- 60307FC4199117AF0E2D97F8AA50D3AD
- SHA-256 fingerprint
- 1E:26:33:78:C9:31:A5:99:19:4A:E7:49:84:41:3B:61:87:94:88:23:1D:C7:D7:AB:C6:06:C7:CD:2A:1D:8F:91
- Chain
- WE1 → GTS Root R4
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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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.
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