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 at-immobilien.com

Valid
Issued by (CA)
Let's Encrypt
Subject
at-immobilien.com
Valid from
Aug 3, 2026
Valid until
Nov 1, 2026 (40 days remaining)
Public key
RSA 2048-bit
Serial
05262B58ADC8C1ED2570EC7E22EDF89D8FF8
SHA-256 fingerprint
71:CB:A8:59:A3:FF:31:AE:F1:48:D3:BF:85:BD:D1:8A:CA:FA:F6:7F:9A:2D:D5:A3:AF:16:39:A5:32:3E:85:3F
Chain
YR1 → Root YR → ISRG Root X1
Subject Alternative Names (2)
at-immobilien.com, www.at-immobilien.com

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 14, 2026.

Never get surprised by at-immobilien.com's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch at-immobilien.com 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.