SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ata-data.net
SSL/TLS Certificate
SSL/TLS Certificate for ata-data.net
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- ata-data.ch
- Valid from
- Jul 19, 2026
- Valid until
- Oct 17, 2026 (37 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 056CB181C6CAE2433001EE4209D8F707BF47
- SHA-256 fingerprint
- 23:F2:6F:FE:82:37:1E:A5:C0:5D:C0:70:77:63:3B:4E:76:1C:1B:B7:54:E2:D3:C1:29:4F:A8:0D:D7:BD:8F:46
- Chain
- YR1 → Root YR → 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 ata-data.net's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ata-data.net 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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