SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
SSL/TLS Certificate for sz-dj.cn
Self-signed- Issued by (CA)
- Unknown
- Subject
- —
- Valid from
- Mar 21, 2024
- Valid until
- Mar 19, 2034 (2785 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0
- SHA-256 fingerprint
- 3B:E7:8A:42:90:5C:B3:0B:E7:11:2A:18:B9:8C:16:BB:C1:63:BD:CD:B6:B7:CA:57:AA:D7:A7:C6:6E:1A:07:EC
- Chain
- —
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by sz-dj.cn's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch sz-dj.cn 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, 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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