SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
zone-01.fr
SSL/TLS Certificate
SSL/TLS Certificate for zone-01.fr
Expiring soon- Issued by (CA)
- Let's Encrypt
- Subject
- zone-01.fr
- Valid from
- Jun 18, 2026
- Valid until
- Sep 16, 2026 (19 days remaining)
- Public key
- EC 256-bit
- Serial
- 058B8F05452A42FCFEEACF8D4207B43BE9CA
- SHA-256 fingerprint
- 11:60:18:51:20:4B:F7:2C:9C:C2:28:C8:EB:F9:24:19:7C:62:99:1B:E3:B3:98:8E:A3:46:54:92:EE:7D:A4:96
- Chain
- YE1 → Root YE → ISRG Root X2 → ISRG Root X1
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 Jul 26, 2026.
Never get surprised by zone-01.fr's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch zone-01.fr 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.