SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
pen-ex.com
SSL/TLS Certificate
SSL/TLS Certificate for pen-ex.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- pen-ex.com
- Valid from
- Aug 27, 2026
- Valid until
- Nov 25, 2026 (79 days remaining)
- Public key
- EC 256-bit
- Serial
- 0597A8AE9F1D80B92B563E3B5EECA749E554
- SHA-256 fingerprint
- 9B:41:BD:F3:35:83:D9:EA:28:7A:5D:42:37:42:F0:ED:CD:5C:7C:A2:7A:85:CD:68:3D:F0:2E:00:E5:29:CD:1A
- 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.
We've observed 1 previous certificate for this host. This certificate has been served since Sep 3, 2026.
Never get surprised by pen-ex.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch pen-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, 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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