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 nolteconsult.com

Expired
Issued by (CA)
Asseco Data Systems S.A.
Subject
*.tekonet.de
Valid from
Oct 13, 2025
Valid until
Oct 13, 2026 (expired 32 days ago)
Public key
RSA 2048-bit
Serial
5AB4CEBA6D3C0C98BACA04FDD218D9E1
SHA-256 fingerprint
B4:54:BA:86:E2:58:7F:BA:25:5E:36:C2:40:FF:74:94:F9:BF:CB:E7:8B:2D:06:D8:0E:BA:8F:23:03:52:11:D9
Chain
Certum DV TLS G2 R39 CA → Certum Trusted Root CA → Certum Trusted Network CA
Subject Alternative Names (2)
*.tekonet.de, tekonet.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 15, 2026.

Never get surprised by nolteconsult.com's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch nolteconsult.com 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.