SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
critical-metrics.com
SSL/TLS Certificate
SSL/TLS Certificate for critical-metrics.com
Self-signed- Issued by (CA)
- localhost
- Subject
- localhost
- Valid from
- Oct 27, 2026
- Valid until
- Oct 24, 2036 (3642 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 6B561265996AD33E32F53EB836B2B8C07B769856
- SHA-256 fingerprint
- 1D:73:9F:FB:11:6C:DD:3C:0C:2C:C8:08:49:B2:C4:F0:42:6C:78:54:23:EF:9B:E9:27:4C:E5:CF:F8:17:96:BE
- Chain
- localhost
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by critical-metrics.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch critical-metrics.com continuously, notifying you the moment anything moves across all three signals:
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, 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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