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 russenbar.de

Expired
Issued by (CA)
Let's Encrypt
Subject
www.sekundarschulen-berlin.de
Valid from
Jun 22, 2018
Valid until
Sep 20, 2018 (expired 2915 days ago)
Public key
RSA 4096-bit
Serial
0468B5D9D84EFE75DF6D6286C2998B3BBF1F
SHA-256 fingerprint
9D:D3:49:9A:0C:94:89:FB:C9:41:EA:BA:98:7B:61:86:49:6A:95:52:CD:73:59:2C:46:77:41:D0:14:62:19:03
Chain
Let's Encrypt Authority X3
Subject Alternative Names (2)
sekundarschulen-berlin.de, www.sekundarschulen-berlin.de

Certificate Authority Authorization (CAA)

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

Never get surprised by russenbar.de's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch russenbar.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.