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 komet-blankenese.org

Valid
Issued by (CA)
Sectigo Limited
Subject
*.komet-blankenese.org
Valid from
May 31, 2026
Valid until
Dec 11, 2026 (32 days remaining)
Public key
RSA 2048-bit
Serial
B1C078A3E1E76DC19BB3E9A62E7AC2AD
SHA-256 fingerprint
BF:2C:BC:A0:7B:8B:41:26:CF:E0:86:CC:59:5B:E6:0A:FE:69:D6:97:EE:24:3D:6B:DF:26:FE:20:19:DF:E1:48
Chain
Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46 → USERTrust RSA Certification Authority
Subject Alternative Names (2)
*.komet-blankenese.org, komet-blankenese.org

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 Sep 25, 2026.

Never get surprised by komet-blankenese.org's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch komet-blankenese.org continuously, notifying you the moment anything moves across all three signals:

Certificate monitor showing the issuer, expiry date, chain status, fingerprint, covered names, and a history of a rotation and an expiry warning

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, CNAME, TXT 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.