SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
koop-plein.nl
SSL/TLS Certificate
SSL/TLS Certificate for koop-plein.nl
Valid- Issued by (CA)
- Google Trust Services
- Subject
- koop-plein.nl
- Valid from
- Sep 14, 2026
- Valid until
- Dec 13, 2026 (86 days remaining)
- Public key
- EC 256-bit
- Serial
- 507A5BED85D6B2E413AA859F516DD3F9
- SHA-256 fingerprint
- 02:9B:57:F4:94:F6:23:04:A3:2F:23:F7:41:C2:F4:0B:CD:6C:41:C9:09:0B:4F:6F:81:55:BA:B9:41:2A:87:FB
- Chain
- WE1 → GTS Root R4
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by koop-plein.nl's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch koop-plein.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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.