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 4-44.de

Valid
Issued by (CA)
Let's Encrypt
Subject
4-44.de
Valid from
Oct 29, 2026
Valid until
Jan 27, 2027 (87 days remaining)
Public key
RSA 4096-bit
Serial
06A0D1BB739862647D406189DFDDD7F52D37
SHA-256 fingerprint
78:F7:57:DA:C3:3D:1B:DB:09:54:11:26:89:DA:70:DF:EF:DB:C2:73:75:7C:38:72:31:A8:E8:EC:0A:68:C6:3D
Chain
YR1 → Root YR → ISRG Root X1
Subject Alternative Names (2)
*.4-44.de, 4-44.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 4, 2026.

Never get surprised by 4-44.de's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch 4-44.de 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.