SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

55501.cn

SSL/TLS Certificate

Whois RDAP DNS Records Certificate Uptime Diagnostics History Hide Contact Info

SSL/TLS Certificate for 55501.cn

Valid

Issued by (CA): TrustAsia Technologies, Inc.
Subject: 50051.cn
Valid from: Jun 9, 2026
Valid until: Sep 7, 2026 (46 days remaining)
Public key: RSA 2048-bit
Serial: 2692DD8B85D499E993B007B99E24EBE119C77428
SHA-256 fingerprint: 04:44:AF:A0:BD:CC:F7:81:0E:8A:2F:CC:0B:14:8C:3C:6C:0F:E7:85:9D:36:4E:FD:6B:C8:A8:9E:0E:F2:18:A9
Chain: LiteSSL RSA CA 2025 → TrustAsia TLS RSA Root CA → Certum Trusted Network CA

Subject Alternative Names (23)

17779.cn, 20203.cn, 30063.cn, 30200.cn, 32103.cn, 33313.cn, 50051.cn, 50082.cn, 50099.cn, 54445.cn, 55501.cn, 60036.cn, 60053.cn, 60061.cn, 60096.cn, 60200.cn, 60300.cn, 66630.cn, 90400.cn, 92220.cn, 99920.cn, xn--45qe.xn--fiqs8s, xn--sjq97e.xn--fiqs8s

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.

Never get surprised by 55501.cn's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch 55501.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.