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 zayo.com
Valid- Issued by (CA)
- Google Trust Services
- Subject
- zayo.com
- Valid from
- Jul 8, 2026
- Valid until
- Oct 6, 2026 (77 days remaining)
- Public key
- EC 256-bit
- Serial
- C63CFA35ADF6824C0E4FBB6D2D8CA823
- SHA-256 fingerprint
- C1:B0:EC:4E:B7:41:DD:2E:5C:48:90:28:52:2D:C3:8F:69:A5:7C:53:9E:D5:20:11:52:0D:E1:1B:08:1E:5F:BA
- Chain
- WE1 → GTS Root R4
Certificate Authority Authorization (CAA)
The serving CA (Google Trust Services) is authorized by this domain's CAA records (amazon.com, comodoca.com, digicert.com, globalsign.com, godaddy.com, letsencrypt.org, pki.goog, ssl.com).