SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
open-domains.com
SSL/TLS Certificate
SSL/TLS Certificate for open-domains.com
Valid- Issued by (CA)
- Google Trust Services
- Subject
- open-domains.com
- Valid from
- Jul 31, 2026
- Valid until
- Oct 29, 2026 (57 days remaining)
- Public key
- EC 256-bit
- Serial
- CFBCABA90775A3E413CDF2E1D67FE4A2
- SHA-256 fingerprint
- 97:1E:F1:70:94:5E:4D:58:FB:42:A5:0F:EF:B7:8E:C7:F2:5C:0A:45:D0:F4:6E:35:F6:A8:CA:C1:FF:A9:A5:AA
- Chain
- WE1 → GTS Root R4
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 Aug 28, 2026.
Never get surprised by open-domains.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch open-domains.com 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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