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 r-it.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- r-it.com
- Valid from
- Aug 12, 2026
- Valid until
- Nov 10, 2026 (67 days remaining)
- Public key
- RSA 3072-bit
- Serial
- 061DABA5D352E5231BAF68644A4BDB043313
- SHA-256 fingerprint
- D2:C8:BF:6A:3B:00:1D:7C:3A:95:72:73:63:5F:4C:EC:BF:FE:56:A8:B4:9C:82:6B:B8:44:77:7C:63:34:CE:3E
- 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 r-it.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch r-it.com 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.