SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
wi-fi.org
SSL/TLS Certificate
SSL/TLS Certificate for wi-fi.org
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- wi-fi.org
- Valid from
- Jul 21, 2026
- Valid until
- Oct 19, 2026 (44 days remaining)
- Public key
- EC 256-bit
- Serial
- 05C5127194B1B45DCDC5793BAB9FB5B0AB8D
- SHA-256 fingerprint
- D2:C1:60:97:C9:B6:0D:22:F8:2A:6C:96:13:F3:E0:9B:B9:F7:0E:17:EE:AB:42:8B:79:CD:40:BD:C5:22:0D:B1
- 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.
Never get surprised by wi-fi.org's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch wi-fi.org 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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