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 geosociety.org.cn

Valid
Issued by (CA)
北京新网数码信息技术有限公司
Subject
geosociety.org.cn
Valid from
Oct 11, 2025
Valid until
Oct 11, 2026 (62 days remaining)
Public key
RSA 2048-bit
Serial
7B6C8C6A4174F96D4AC689EA523CA6B3
SHA-256 fingerprint
E9:94:F3:EF:98:A2:B9:4C:E1:4A:40:1E:8E:A2:B5:54:39:83:74:A4:83:55:E2:79:EB:47:9F:A0:A4:A3:C7:DA
Chain
Xinnet OV SSL → UCA Global G2 Root → Certum Trusted Network CA
Subject Alternative Names (2)
geosociety.org.cn, www.geosociety.org.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 Jul 27, 2026.

Never get surprised by geosociety.org.cn's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch geosociety.org.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.

Monitor this certificate free

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