SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
active-technology.org
SSL/TLS Certificate
SSL/TLS Certificate for active-technology.org
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- *.active-bg.eu
- Valid from
- Jul 22, 2026
- Valid until
- Oct 20, 2026 (77 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 058C7ED032253387A3E2B2A64493F763D4B8
- SHA-256 fingerprint
- 03:BC:79:2E:F9:CA:FA:DF:23:CA:C0:E4:BF:D1:CE:CD:4A:F7:3E:19:4C:AE:3F:82:2A:A2:7F:DF:D5:B9:EB:23
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by active-technology.org's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch active-technology.org 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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