SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
SSL/TLS Certificate for ctl.one
Expired- Issued by (CA)
- DigiCert Inc
- Subject
- www.lumen.com
- Valid from
- Sep 11, 2020
- Valid until
- Sep 16, 2021 (expired 1769 days ago)
- Public key
- RSA 2048-bit
- Serial
- 0EBEFDC369802B3680C27EC134ADF64E
- SHA-256 fingerprint
- 64:3A:9F:E7:2F:3C:05:4C:16:AF:6B:41:68:18:AD:BC:44:90:9A:D6:A9:BA:11:10:4A:3F:7B:5F:F4:28:50:85
- Chain
- DigiCert SHA2 Secure Server CA → DigiCert Global Root CA
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.