SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
forty-two.nl
SSL/TLS Certificate
SSL/TLS Certificate for forty-two.nl
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- forty-two.nl
- Valid from
- Aug 16, 2026
- Valid until
- Nov 14, 2026 (29 days remaining)
- Public key
- EC 384-bit
- Serial
- 0627514DA686C1A7468A02BC5E32EF10E0AE
- SHA-256 fingerprint
- A6:DC:DD:AF:8A:2F:17:36:9C:D8:1B:46:20:CF:6B:AF:7F:75:90:EF:6B:40:C6:8C:7E:F4:2F:D2:ED:88:8A:DB
- Chain
- YE1 → Root YE → ISRG Root X2 → ISRG Root X1
Certificate Authority Authorization (CAA)
The serving CA (Let's Encrypt) is authorized by this domain's CAA records (letsencrypt.org).
We've observed 1 previous certificate for this host. This certificate has been served since Sep 2, 2026.
Never get surprised by forty-two.nl's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch forty-two.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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