SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
castplanet.com
SSL/TLS Certificate
SSL/TLS Certificate for castplanet.com
Expiring soon- Issued by (CA)
- Sectigo Limited
- Subject
- castplanet.com
- Valid from
- Apr 8, 2026
- Valid until
- Oct 5, 2026 (8 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 985738354F5CEF0DAD81C22EA9DCF49F
- SHA-256 fingerprint
- 8D:1E:EC:D2:07:47:8C:41:1F:8C:4E:95:D7:E0:4B:3B:2D:2F:23:1F:AA:F9:84:88:3E:54:7B:43:AB:62:FB:E8
- Chain
- Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46 → USERTrust RSA Certification Authority
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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This is today's certificate. Turn on monitoring and we'll watch castplanet.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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