SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
nhm-wien.ac.at
SSL/TLS Certificate
SSL/TLS Certificate for nhm-wien.ac.at
Self-signed- Issued by (CA)
- Internet Widgits Pty Ltd
- Subject
- www.example.org
- Valid from
- Oct 20, 2026
- Valid until
- Oct 17, 2036 (3627 days remaining)
- Public key
- EC 384-bit
- Serial
- 2C5B2BF6EE598DD1A853F1C363109EF8CAEDDBC4
- SHA-256 fingerprint
- AC:15:3A:80:55:D4:10:B5:CA:96:9E:78:6D:C5:B6:44:DA:23:5F:10:AA:48:2E:83:D8:06:0F:C2:93:56:BD:94
- Chain
- www.example.org
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 28, 2026.
Never get surprised by nhm-wien.ac.at's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch nhm-wien.ac.at 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, 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.