SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
aru.ac.th
SSL/TLS Certificate
SSL/TLS Certificate for aru.ac.th
Valid- Issued by (CA)
- GlobalSign nv-sa
- Subject
- www.aru.ac.th
- Valid from
- Jul 12, 2026
- Valid until
- Oct 10, 2026 (35 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0112E8A1887F3407E67AA25761778213
- SHA-256 fingerprint
- 48:BB:4A:53:3E:55:86:EE:A8:CE:FC:33:54:F0:7F:59:BC:B8:C5:E8:04:C9:A3:1C:E3:E6:04:8E:42:84:D1:CE
- Chain
- GlobalSign Atlas R46 DV TLS CA 2026 Q2 → GlobalSign Root R46 → GlobalSign
Certificate Authority Authorization (CAA)
The serving CA (GlobalSign nv-sa) is authorized by this domain's CAA records (globalsign.com).
Never get surprised by aru.ac.th's certificate expiring
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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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