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 das-lungenzentrum.org

Valid
Issued by (CA)
Let's Encrypt
Subject
ruhrlandklinik.de
Valid from
Aug 4, 2026
Valid until
Nov 2, 2026 (48 days remaining)
Public key
RSA 2048-bit
Serial
05013C3A89737FA195AD5F42E9FCD2E6F584
SHA-256 fingerprint
77:61:2C:F2:C6:E3:68:4B:78:2E:DD:8A:A3:10:94:06:8A:B8:D3:8A:BA:5D:A2:9A:CA:79:40:34:3A:AD:8D:64
Chain
YR1 → Root YR → ISRG Root X1
Subject Alternative Names (60)
das-lungenzentrum.biz, das-lungenzentrum.com, das-lungenzentrum.de, das-lungenzentrum.info, das-lungenzentrum.net, das-lungenzentrum.org, daslungenzentrum.biz, daslungenzentrum.com, daslungenzentrum.de, daslungenzentrum.info, daslungenzentrum.net, daslungenzentrum.org, haus-der-lunge.de, lungenzentrum.biz, lungenzentrum.info, lungenzentrum.net, lungenzentrum.org, ruhrlandklinik-essen.biz, ruhrlandklinik-essen.com, ruhrlandklinik-essen.de, ruhrlandklinik-essen.info, ruhrlandklinik-essen.net, ruhrlandklinik-essen.org, ruhrlandklinik.biz, ruhrlandklinik.com, ruhrlandklinik.de, ruhrlandklinik.info, ruhrlandklinik.net, ruhrlandklinik.org, ruhrlandklinikhausderlunge.de, www.das-lungenzentrum.biz, www.das-lungenzentrum.com, www.das-lungenzentrum.de, www.das-lungenzentrum.info, www.das-lungenzentrum.net, www.das-lungenzentrum.org, www.daslungenzentrum.biz, www.daslungenzentrum.com, www.daslungenzentrum.de, www.daslungenzentrum.info, www.daslungenzentrum.net, www.daslungenzentrum.org, www.haus-der-lunge.de, www.lungenzentrum.biz, www.lungenzentrum.info, www.lungenzentrum.net, www.lungenzentrum.org, www.ruhrlandklinik-essen.biz, www.ruhrlandklinik-essen.com, www.ruhrlandklinik-essen.de, www.ruhrlandklinik-essen.info, www.ruhrlandklinik-essen.net, www.ruhrlandklinik-essen.org, www.ruhrlandklinik.biz, www.ruhrlandklinik.com, www.ruhrlandklinik.de, www.ruhrlandklinik.info, www.ruhrlandklinik.net, www.ruhrlandklinik.org, www.ruhrlandklinikhausderlunge.de

Certificate Authority Authorization (CAA)

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

This certificate has been served since Aug 22, 2026.

Never get surprised by das-lungenzentrum.org's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch das-lungenzentrum.org 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.