Find every subdomain
of a domain.

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

7 hosts · 269 ms

HostCertsFirst seenLast seen
western.bank 9 2026-05-29 2026-10-01
*.western.bank 3 2026-05-29 2026-08-13
collab-edge.western.bank 1 2026-04-13 2026-04-13
exp-edge.western.bank 3 2025-11-05 2026-04-13
tracking.western.bank 2 2026-04-29 2026-04-29
link.western.bank 5 2026-05-20 2026-09-17
www.western.bank 6 2026-05-31 2026-10-01

Programmatic access: API GET /v1/hosts/western.bank (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/western.bank.