SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
gew-nrw.de
SSL/TLS Certificate
SSL/TLS Certificate for gew-nrw.de
Valid- Issued by (CA)
- Asseco Data Systems S.A.
- Subject
- *.gew-nrw.de
- Valid from
- Sep 3, 2026
- Valid until
- Mar 21, 2027 (194 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 19B5478034CD2508363130E539D63C84
- SHA-256 fingerprint
- 0A:49:6D:54:C1:F8:74:AE:46:A4:52:9E:94:45:EC:2E:CE:68:17:2C:2D:10:CA:E0:ED:09:80:E5:92:0A:CF:91
- Chain
- Certum DV TLS G2 R39 CA → Certum Trusted Root CA
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by gew-nrw.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch gew-nrw.de continuously, notifying you the moment anything moves across all three signals:
Uptime
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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.
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