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 vi-ko.hu
Hostname mismatch- Issued by (CA)
- Let's Encrypt
- Subject
- secure.prevenciokft.hu
- Valid from
- Jul 26, 2026
- Valid until
- Oct 24, 2026 (81 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 059D7BC858E9C5A1546D9FA6293FC24B4AAC
- SHA-256 fingerprint
- 95:13:F8:77:8E:6C:23:B0:A3:3D:B3:41:7E:D7:E2:58:85:96:C8:79:DB:9D:99:45:38:A4:A6:EE:C0:E2:BF:84
- Chain
- YR1 → 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 vi-ko.hu's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch vi-ko.hu 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.