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 a-i-t.ru
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- a-i-t.ru
- Valid from
- Jul 15, 2026
- Valid until
- Oct 13, 2026 (32 days remaining)
- Public key
- EC 256-bit
- Serial
- 0530C27CAEA83C2D952D1474499EBE72FC8F
- SHA-256 fingerprint
- DD:DF:DB:B3:02:01:EB:0A:14:0A:70:46:FC:EE:00:B0:71:B4:68:25:C9:6A:2C:77:79:56:7F:2A:EC:3B:44:E2
- Chain
- YE2 → Root YE → ISRG Root X2 → 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 a-i-t.ru's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch a-i-t.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.