SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
so-what.nl
SSL/TLS Certificate
SSL/TLS Certificate for so-what.nl
Valid- Issued by (CA)
- Google Trust Services
- Subject
- so-what.nl
- Valid from
- Aug 15, 2026
- Valid until
- Nov 14, 2026 (57 days remaining)
- Public key
- EC 256-bit
- Serial
- 0723EB4D5C8A80F80E15B13C6B202104
- SHA-256 fingerprint
- 10:01:9B:B5:B0:AD:33:8B:ED:88:E8:4B:48:22:25:49:D3:54:29:99:6A:65:90:1C:5F:D1:8E:3E:44:CE:7C:9E
- Chain
- WE1 → GTS Root R4
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 10, 2026.
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This is today's certificate. Turn on monitoring and we'll watch so-what.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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