SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
gero-lumen.com
SSL/TLS Certificate
SSL/TLS Certificate for gero-lumen.com
Valid- Issued by (CA)
- Sectigo Limited
- Subject
- *.gero-lumen.com
- Valid from
- Oct 12, 2026
- Valid until
- Apr 10, 2027 (173 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 30CA06F5EC8622EB9533596B3769F0DD
- SHA-256 fingerprint
- 30:B3:8B:51:7D:6B:96:0D:7E:EB:82:00:43:A3:44:8F:34:4C:29:E5:D9:1A:7F:31:8B:87:B6:20:E6:12:5A:82
- 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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Uptime
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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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