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 baihai.cn

Expired
Issued by (CA)
Unizeto Technologies S.A.
Subject
www.baihai.cn
Valid from
Oct 23, 2024
Valid until
Nov 22, 2025 (expired 353 days ago)
Public key
RSA 2048-bit
Serial
41BB213B9D451C2B2F85A737B032288C
SHA-256 fingerprint
9B:64:04:8D:85:B1:42:70:5F:C9:C3:30:73:E4:B1:3B:1F:14:2A:35:EB:45:CA:4F:EB:D7:2F:B9:35:C0:E0:CB
Chain
Certum Domain Validation CA SHA2 → Certum Trusted Network CA
Subject Alternative Names (2)
baihai.cn, www.baihai.cn

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 Oct 8, 2026.

Never get surprised by baihai.cn's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch baihai.cn continuously, notifying you the moment anything moves across all three signals:

Certificate monitor showing the issuer, expiry date, chain status, fingerprint, covered names, and a history of a rotation and an expiry warning

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.

Monitor this certificate free

Free for your first domain: uptime, DNS, and certificate together. No credit card.