SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
um-nik.ru
SSL/TLS Certificate
SSL/TLS Certificate for um-nik.ru
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- um-nik.ru
- Valid from
- Jun 22, 2026
- Valid until
- Sep 20, 2026 (36 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 056206B545150D9478FC0A519BB9BB6860B0
- SHA-256 fingerprint
- 45:31:9A:BC:A6:01:D3:79:6E:4C:7C:48:C6:44:AC:1B:72:2A:FF:6E:CD:A4:13:22:0F:C3:11:76:2D:67:61:7A
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by um-nik.ru's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch um-nik.ru 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.