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 mtd-chemnitz.de

Valid
Issued by (CA)
Sectigo Limited
Subject
www.mtd-chemnitz.de
Valid from
Jul 9, 2026
Valid until
Jan 23, 2027 (184 days remaining)
Public key
RSA 2048-bit
Serial
6E6B0FC239A60FC2BAF03657375B6CDA
SHA-256 fingerprint
5B:F1:37:25:F6:41:EC:34:F7:11:3B:D6:61:DE:0A:5C:60:10:48:38:8D:19:DD:55:96:0F:30:12:FA:89:83:4A
Chain
Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46 → USERTrust RSA Certification Authority
Subject Alternative Names (2)
mtd-chemnitz.de, www.mtd-chemnitz.de

Certificate Authority Authorization (CAA)

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

Never get surprised by mtd-chemnitz.de's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch mtd-chemnitz.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.