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 ustu.ru
Hostname mismatch- Issued by (CA)
- GlobalSign nv-sa
- Subject
- *.urfu.ru
- Valid from
- Dec 9, 2025
- Valid until
- Jan 10, 2027 (167 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 2C7A764B0A711EE418F82F1C
- SHA-256 fingerprint
- 24:F6:8D:D3:DA:F9:5E:34:3D:53:1F:33:B9:D3:6D:5D:DF:C1:F5:66:20:4A:23:C1:A0:71:80:CA:87:FF:E5:8E
- 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 Jul 23, 2026.
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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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