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 (46 days remaining)
- Public key
- EC 256-bit
- Serial
- 30903E8C64421B1A13B6A1D84D32E8A4
- SHA-256 fingerprint
- 28:C4:B6:E2:8B:B9:5F:7B:7B:96:82:6A:73:B7:2A:62:EE:E5:36:78:F3:D8:2C:76:76:72:EF:9F:9A:A2:B6:1B
- 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.