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 ad-reactor.de

Expired
Issued by (CA)
Starfield Technologies, Inc.
Subject
www.avatter.de
Valid from
Nov 17, 2022
Valid until
Nov 17, 2023 (expired 1063 days ago)
Public key
RSA 4096-bit
Serial
6B126FF4C5D55B98
SHA-256 fingerprint
2C:56:35:CD:34:CC:01:87:81:83:15:93:4D:22:F2:3C:2A:A3:60:58:57:63:6A:7F:66:3F:47:F3:98:1D:CA:9A
Chain
Starfield Secure Certificate Authority - G2 → Starfield Root Certificate Authority - G2
Subject Alternative Names (2)
avatter.de, www.avatter.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 Sep 22, 2026.

Never get surprised by ad-reactor.de's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch ad-reactor.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.