SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
rf-spectrum.com
SSL/TLS Certificate
SSL/TLS Certificate for rf-spectrum.com
Expired- Issued by (CA)
- DigiCert, Inc.
- Subject
- secure.smartcardsource.com
- Valid from
- Jun 20, 2022
- Valid until
- Jun 20, 2023 (expired 1144 days ago)
- Public key
- RSA 2048-bit
- Serial
- 049971957BD2EC2F7998F0DB3C2407A2
- SHA-256 fingerprint
- A3:50:3E:18:6F:2D:76:61:BC:F6:9F:EC:BB:BE:FA:FE:83:98:CD:97:08:35:15:6C:10:D8:A3:DC:E3:4D:FD:A2
- Chain
- GeoTrust Global TLS RSA4096 SHA256 2022 CA1 → DigiCert Global Root CA
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 Jul 30, 2026.
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DNS changes
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TLS certificate
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