SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
cb-gmbh.net
SSL/TLS Certificate
SSL/TLS Certificate for cb-gmbh.net
Hostname mismatch- Issued by (CA)
- Sectigo Limited
- Subject
- *.rahmenvereinbarungen.de
- Valid from
- May 22, 2026
- Valid until
- Dec 6, 2026 (73 days remaining)
- Public key
- RSA 2048-bit
- Serial
- C5372227009AB131E3D266ADF8D97EA3
- SHA-256 fingerprint
- 2D:F7:22:29:0C:64:B1:2F:CF:B0:2A:1F:51:1F:D1:49:AD:5A:5C:FF:D2:9A:E0:E9:0B:88:2B:32:0D:CA:70:A7
- Chain
- Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by cb-gmbh.net's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch cb-gmbh.net 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.