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.

18 hosts · 405 ms

HostCertsFirst seenLast seenDNS
goldin.co 10 2025-07-09 2026-09-24 ok
cloud.e.goldin.co 1 2025-11-07 2025-11-07 ok
image.e.goldin.co 3 2025-12-15 2026-01-06 ok
click.e.goldin.co 1 2025-11-06 2025-11-06 ok
view.e.goldin.co 1 2025-11-06 2025-11-06 ok
mi.goldin.co 1 2026-04-07 2026-04-07 ok
image.email.goldin.co 2 2026-04-19 2026-04-19 ok
admin.goldin.co 9 2025-07-09 2026-09-17 ok
caas.goldin.co 3 2026-03-12 2026-03-16 ok
admin-test.goldin.co 9 2025-07-09 2026-09-17 ok
bidder-test.goldin.co 10 2025-07-09 2026-09-17 ok
caas.bidder-test.goldin.co 2 2026-03-12 2026-03-16 ok
admin-dev.goldin.co 9 2025-07-09 2026-09-17 ok
bidder-dev.goldin.co 12 2025-07-09 2026-09-17 ok
*.bidder-dev.goldin.co 2 2025-07-24 2026-06-24 —
api.bidder-dev.goldin.co 7 2025-07-09 2026-09-17 nxdomain
caas.bidder-dev.goldin.co 1 2026-02-17 2026-02-17 ok
www.goldin.co 7 2025-07-09 2026-09-17 ok

Programmatic access, with DNS A records: API GET /v1/hosts/goldin.co (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/goldin.co.