Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

31 hosts · 291 ms

HostCertsFirst seenLast seenDNS
fnb-corp.com 14 2026-04-25 2026-08-21 ok
*.fnb-corp.com 14 2026-04-25 2026-08-21 —
vpn1.fnb-corp.com 1 2025-07-01 2025-07-01 ok
url2602.fnb-corp.com 2 2026-09-28 2026-09-28 ok
vpn2.fnb-corp.com 1 2025-07-01 2025-07-01 ok
vpn3.fnb-corp.com 1 2025-07-01 2025-07-01 ok
vpn4.fnb-corp.com 1 2025-07-01 2025-07-01 ok
vpn5.fnb-corp.com 3 2025-07-01 2026-07-08 ok
vpn6.fnb-corp.com 3 2025-07-01 2026-07-08 ok
ConnWCFQA.fnb-corp.com 1 2026-01-27 2026-01-27 —
ConnWCFPRD.fnb-corp.com 1 2026-02-05 2026-02-05 —
ConnWCFTRN.fnb-corp.com 1 2026-02-05 2026-02-05 —
Creatio-COO.fnb-corp.com 1 2026-09-01 2026-09-01 —
Connects-COO.fnb-corp.com 4 2026-03-05 2026-09-14 —
ConnWCFDEV.fnb-corp.com 1 2026-02-05 2026-02-05 —
workspace-cb.fnb-corp.com 3 2025-09-05 2026-10-01 ok
workspacetest-cb.fnb-corp.com 6 2026-03-10 2026-09-15 ok
temenos-poc.fnb-corp.com 2 2026-02-18 2026-03-09 ok
workspace.fnb-corp.com 3 2025-09-05 2026-10-01 ok
woodridge.fnb-corp.com 1 2025-12-08 2025-12-08 ok
sharefile.fnb-corp.com 1 2026-01-08 2026-01-08 ok
workspace-h.fnb-corp.com 3 2025-09-05 2026-10-01 ok
workspacetest-h.fnb-corp.com 6 2026-03-10 2026-09-15 ok
workspace-i.fnb-corp.com 3 2025-09-05 2026-10-01 ok
workspacetest-i.fnb-corp.com 6 2026-03-10 2026-09-15 ok
cisionone-email.fnb-corp.com 5 2026-05-26 2026-09-24 ok
connect.fnb-corp.com 3 2025-07-01 2026-07-08 ok
workspacetest.fnb-corp.com 6 2026-03-10 2026-09-15 ok
sharefiletest.fnb-corp.com 2 2025-12-04 2025-12-04 ok
smtpout.fnb-corp.com 2 2026-01-21 2026-01-23 ok
velocity.fnb-corp.com 3 2025-07-22 2026-07-13 ok

Programmatic access, with DNS A records: API GET /v1/hosts/fnb-corp.com (API key for paging).

Shown here: hostnames with a certificate that is valid now or expired within the last 90 days. The full history since 2013 — hostnames whose last certificate expired earlier — is a Pro plan method: GET /v1/hosts-history/fnb-corp.com.