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.

23 hosts · 326 ms

HostCertsFirst seenLast seenDNS
golf.com 19 2026-04-19 2026-09-09 ok
*.golf.com 23 2025-06-16 2026-10-03 —
ebgolfmedia.golf.com 3 2026-04-21 2026-09-21 ok
iframe.golf.com 5 2026-05-13 2026-09-10 ok
release.golf.com 5 2026-05-06 2026-09-03 ok
archive.golf.com 2 2026-03-25 2026-08-25 ok
awin-tracking.golf.com 2 2026-07-16 2026-09-09 ok
staging.api.golf.com 2 2025-07-08 2026-06-08 ok
production.api.golf.com 2 2025-07-30 2026-06-30 ok
link.golf.com 5 2026-05-22 2026-09-19 ok
full-site-test-clean.golf.com 4 2026-05-25 2026-07-24 ok
shop.golf.com 13 2026-04-13 2026-08-21 ok
proshop.golf.com 2 2026-02-28 2026-07-16 nodata
reader.golf.com 4 2026-03-25 2026-09-13 ok
coursefinder.golf.com 8 2026-04-12 2026-08-08 ok
bytes.golf.com 5 2026-04-22 2026-09-09 ok
development.golf.com 5 2026-05-28 2026-09-25 ok
full-site-test.golf.com 4 2026-05-25 2026-07-24 ok
no-ads-test.golf.com 4 2026-06-07 2026-10-05 ok
pantheontest.golf.com 4 2026-04-19 2026-08-17 ok
onetrust.golf.com 2 2025-09-02 2026-08-03 ok
pantheondev.golf.com 4 2026-04-19 2026-08-17 ok
www.golf.com 5 2026-04-19 2026-08-17 ok

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