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 m-p.at
Hostname mismatch- Issued by (CA)
- Let's Encrypt
- Subject
- http3.praesis.net
- Valid from
- Jun 6, 2026
- Valid until
- Sep 4, 2026 (43 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0637F18D61840E399863D6AE19A047150501
- SHA-256 fingerprint
- A7:2B:A6:1F:53:D1:DA:E2:B1:E6:0F:FF:EF:2D:4C:E5:49:08:F2:30:3E:58:7A:1D:B1:14:87:A8:5B:3A:88:89
- 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 m-p.at's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch m-p.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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.