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 ars.hk
Valid- Issued by (CA)
- GlobalSign nv-sa
- Subject
- www.ars.hk
- Valid from
- Jan 26, 2026
- Valid until
- Feb 27, 2027 (149 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 2BFD5A325D110CD04946E7FA
- SHA-256 fingerprint
- 7D:26:95:1F:45:82:6C:A1:F0:2F:1E:8B:69:68:3E:37:2E:7D:7A:65:DF:C5:2C:9E:DE:0C:BE:C4:19:92:D6:24
- Chain
- GlobalSign GCC R3 DV TLS CA 2020 → GlobalSign
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 Sep 24, 2026.
Never get surprised by ars.hk's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ars.hk 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.