SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
active-defender.info
SSL/TLS Certificate
SSL/TLS Certificate for active-defender.info
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- active-defender.info
- Valid from
- Oct 30, 2026
- Valid until
- Jan 28, 2027 (87 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06D09B6C5994F5C570233080BDC1AEFA7C7C
- SHA-256 fingerprint
- 5B:0F:D1:E0:B8:36:3F:F3:AE:12:55:F8:EB:B6:94:5B:47:F3:D7:E6:D8:80:5C:05:38:41:57:2C:F4:1A:42:21
- 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.
This certificate has been served since Oct 31, 2026.
Never get surprised by active-defender.info's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch active-defender.info 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.
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