SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
sig-ex.com
SSL/TLS Certificate
SSL/TLS Certificate for sig-ex.com
Valid- Issued by (CA)
- Google Trust Services
- Subject
- tls.automattic.com
- Valid from
- Sep 13, 2026
- Valid until
- Dec 12, 2026 (40 days remaining)
- Public key
- EC 256-bit
- Serial
- 702FEC6B38DC553713938773FEDA4EB3
- SHA-256 fingerprint
- CB:30:D7:12:A8:EB:01:12:5A:C0:8F:8E:78:F1:85:77:A4:B8:D4:08:DF:FD:9C:C4:8D:41:28:61:04:52:B5:7E
- Chain
- WR1 → GTS Root R1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
We've observed 1 previous certificate for this host. This certificate has been served since Sep 29, 2026.
Never get surprised by sig-ex.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch sig-ex.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, CNAME, TXT 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.