SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
half-half.cn
SSL/TLS Certificate
SSL/TLS Certificate for half-half.cn
Valid- Issued by (CA)
- Asseco Data Systems S.A.
- Subject
- *.half-half.cn
- Valid from
- May 29, 2026
- Valid until
- Dec 14, 2026 (96 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 439A3B46815423189C4E7937B30BF97C
- SHA-256 fingerprint
- 55:9E:7B:B7:7A:73:53:23:B6:70:C0:9B:6A:B2:DD:D8:F2:BE:B5:36:37:CF:27:AF:07:D9:39:0B:6A:9D:AB:51
- Chain
- Certum DV TLS G2 R39 CA → Certum Trusted Root CA → Certum Trusted Network CA
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by half-half.cn's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch half-half.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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