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.

55 hosts · 403 ms

HostCertsFirst seenLast seenDNS
goldin.com 8 2025-07-09 2026-09-22 ok
pda.goldin.com 7 2025-07-09 2026-09-17 ok
qa.goldin.com 3 2025-08-13 2026-07-14 nodata
*.qa.goldin.com 3 2025-08-13 2026-07-14 —
qa-1.qa.goldin.com 2 2025-08-13 2026-07-14 nodata
*.qa-1.qa.goldin.com 2 2025-08-13 2026-07-14 —
api.qa-1.qa.goldin.com 4 2025-08-21 2026-07-22 nodata
*.api.qa-1.qa.goldin.com 4 2025-08-21 2026-07-22 —
qa-2.qa.goldin.com 1 2025-08-13 2025-08-13 nodata
*.qa-2.qa.goldin.com 1 2025-08-13 2025-08-13 —
api.qa.goldin.com 4 2025-08-21 2026-07-22 nodata
*.api.qa.goldin.com 4 2025-08-21 2026-07-22 —
prod.goldin.com 2 2025-08-21 2026-07-22 nodata
*.prod.goldin.com 2 2025-08-21 2026-07-22 —
prod-1.prod.goldin.com 2 2025-08-21 2026-07-22 nodata
*.prod-1.prod.goldin.com 2 2025-08-21 2026-07-22 —
api.prod-1.prod.goldin.com 4 2025-08-21 2026-07-22 nodata
*.api.prod-1.prod.goldin.com 4 2025-08-21 2026-07-22 —
api.prod.goldin.com 4 2025-08-21 2026-07-22 nodata
*.api.prod.goldin.com 4 2025-08-21 2026-07-22 —
e.goldin.com 7 2025-07-09 2026-09-17 ok
track.goldin.com 5 2026-03-26 2026-09-17 ok
mail.goldin.com 7 2025-07-09 2026-09-17 nodata
webmail.goldin.com 7 2025-07-09 2026-09-17 ok
email.goldin.com 7 2025-07-09 2026-09-17 ok
mobilemail.goldin.com 7 2025-07-09 2026-09-17 ok
imap.goldin.com 7 2025-07-09 2026-09-17 ok
pop.goldin.com 7 2025-07-09 2026-09-17 ok
ftp.goldin.com 7 2025-07-09 2026-09-17 ok
smtp.goldin.com 7 2025-07-09 2026-09-17 ok
rsvp.goldin.com 1 2026-09-22 2026-09-22 ok
clicks.goldin.com 5 2026-03-26 2026-09-17 ok
events.goldin.com 2 2026-09-24 2026-09-24 ok
test.goldin.com 4 2026-04-09 2026-09-17 nxdomain
dev.goldin.com 6 2025-06-11 2026-09-02 nodata
*.dev.goldin.com 6 2025-06-11 2026-09-02 —
dev-1.dev.goldin.com 2 2025-08-13 2026-07-14 nodata
*.dev-1.dev.goldin.com 2 2025-08-13 2026-07-14 —
api.dev-1.dev.goldin.com 6 2025-08-07 2026-07-19 nodata
*.api.dev-1.dev.goldin.com 6 2025-08-07 2026-07-19 —
dev-2.dev.goldin.com 1 2025-08-13 2025-08-13 nodata
*.dev-2.dev.goldin.com 1 2025-08-13 2025-08-13 —
api.dev-2.dev.goldin.com 2 2025-08-12 2025-08-18 nodata
*.api.dev-2.dev.goldin.com 2 2025-08-12 2025-08-18 —
api.dev.goldin.com 9 2025-08-07 2026-09-02 nodata
*.api.dev.goldin.com 9 2025-08-07 2026-09-02 —
dev-feat-sap.dev.goldin.com 1 2026-09-25 2026-09-25 nodata
*.dev-feat-sap.dev.goldin.com 1 2026-09-25 2026-09-25 —
api.dev-feat-sap.dev.goldin.com 1 2026-09-25 2026-09-25 nodata
*.api.dev-feat-sap.dev.goldin.com 1 2026-09-25 2026-09-25 —
dev-jerry.dev.goldin.com 2 2026-09-02 2026-09-04 nodata
*.dev-jerry.dev.goldin.com 2 2026-09-02 2026-09-04 —
api.dev-jerry.dev.goldin.com 2 2026-09-02 2026-09-04 nodata
*.api.dev-jerry.dev.goldin.com 5 2026-09-02 2026-09-09 —
www.goldin.com 7 2025-07-09 2026-09-17 ok

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