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 lh-r.at
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- lh-r.at
- Valid from
- Jun 18, 2026
- Valid until
- Sep 16, 2026 (38 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 053B2666F9895C361D0503BC515F452C7483
- SHA-256 fingerprint
- 57:25:D6:F6:75:5A:80:CE:BA:A8:E3:B0:C2:A8:C2:BB:FF:19:81:87:3B:D7:36:FB:14:27:1E:3B:91:AD:0D:98
- 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.
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This is today's certificate. Turn on monitoring and we'll watch lh-r.at 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.
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