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 s-it.nl
Self-signed- Issued by (CA)
- none
- Subject
- localhost
- Valid from
- Oct 4, 2013
- Valid until
- Oct 2, 2023 (expired 1031 days ago)
- Public key
- RSA 1024-bit
- Serial
- 181BCEAE6D
- SHA-256 fingerprint
- 0F:2B:78:B9:CF:46:A3:40:32:71:60:FA:7E:59:B5:AB:44:90:B6:28:35:BD:2A:3A:A9:3D:2D:44:AD:47:56:DF
- Chain
- localhost
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by s-it.nl's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch s-it.nl 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.
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