SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
at-plan.biz
SSL/TLS Certificate
SSL/TLS Certificate for at-plan.biz
Valid- Issued by (CA)
- Starfield Technologies
- Subject
- www.at-plan.biz
- Valid from
- Oct 23, 2026
- Valid until
- Dec 9, 2026 (25 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 48481942323F5390
- SHA-256 fingerprint
- 95:2B:75:3C:79:FC:45:6D:38:D2:69:3B:C9:23:47:2F:52:5B:0C:F1:93:91:C2:E1:A5:7A:EF:91:CE:F5:3A:65
- Chain
- Starfield TLS Intermediate CA DV - R1v1 → Starfield TLS Root CA - R1 → Starfield Root Certificate Authority - G2
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by at-plan.biz's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch at-plan.biz 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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