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.

21 hosts · 316 ms

HostCertsFirst seenLast seenDNS
goop.com 20 2026-05-14 2026-09-25 ok
*.goop.com 20 2026-05-14 2026-09-25 —
brentwood.goop.com 12 2026-05-07 2026-09-03 ok
welcome.goop.com 16 2026-05-15 2026-09-10 ok
store.goop.com 9 2026-04-16 2026-08-26 ok
capi.goop.com 2 2025-06-17 2025-06-17 nxdomain
*.capi.goop.com 1 2025-06-17 2025-06-17 —
2a57j77ubhgu6usx8dkhw6zu4n39wq9.capi.goop.com 1 2025-06-17 2025-06-17 nodata
gapi.goop.com 3 2026-03-28 2026-08-28 nodata
trk.k.goop.com 10 2026-04-18 2026-08-15 ok
track.goop.com 1 2025-11-10 2025-11-10 ok
link.goop.com 1 2026-01-04 2026-01-04 ok
return.goop.com 5 2025-07-30 2026-09-21 ok
www.return.goop.com 2 2025-07-30 2026-07-08 nxdomain
cdp.goop.com 2 2025-11-02 2026-10-03 ok
signature.tools.goop.com 2 2026-04-21 2026-08-11 ok
instructor.tools.goop.com 2 2026-05-06 2026-09-07 ok
qr.tools.goop.com 2 2026-04-21 2026-08-11 ok
goop-cms.goop.com 3 2026-04-13 2026-09-13 ok
privateclient.goop.com 8 2026-05-07 2026-09-02 ok
account.goop.com 15 2026-04-16 2026-08-25 ok

Programmatic access, with DNS A records: API GET /v1/hosts/goop.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/goop.com.