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 schnoor-it.de

Hostname mismatch
Issued by (CA)
Let's Encrypt
Subject
mail.schnoor-it.de
Valid from
May 29, 2026
Valid until
Aug 27, 2026 (35 days remaining)
Public key
RSA 4096-bit
Serial
0513C7689F9B8C55BD2474EFF1CF305B91DF
SHA-256 fingerprint
E6:19:D4:DA:FF:25:F5:95:56:8F:E6:AC:87:43:A6:DE:8E:F5:62:30:2E:C7:F0:B0:2A:B3:57:F1:DF:8D:6A:F8
Chain
YR2 → Root YR → ISRG Root X1
Subject Alternative Names (11)
autoconfig.fc-koeln.eu, autoconfig.hbglan.de, autoconfig.schnoor-it.de, autoconfig.schnoor.koeln, autodiscover.fc-koeln.eu, autodiscover.hbglan.de, autodiscover.schnoor-it.de, autodiscover.schnoor.koeln, mail.schnoor-it.de, mta-sts.schnoor-it.de, mta-sts.schnoor.koeln

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.

Never get surprised by schnoor-it.de's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch schnoor-it.de 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.

Monitor this certificate free

Free for your first domain: uptime, DNS, and certificate together. No credit card.