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.

20 hosts · 211 ms

HostCertsFirst seenLast seen
happychef.com 22 2025-10-01 2026-10-02
*.happychef.com 17 2025-10-01 2026-10-02
ws-web2.happychef.com 5 2026-05-14 2026-09-11
mcstaging-sage2.happychef.com 5 2026-05-01 2026-08-29
mcstaging2.happychef.com 5 2026-05-01 2026-08-29
sage.happychef.com 5 2026-05-14 2026-09-11
mcstaging-sage.happychef.com 5 2026-05-10 2026-09-07
ws-core.happychef.com 4 2026-02-18 2026-10-02
mcstaging.happychef.com 5 2026-05-10 2026-09-07
email.happychef.com 2 2025-07-30 2026-06-29
help.happychef.com 5 2026-05-06 2026-09-03
tracking.notifications.happychef.com 4 2026-08-06 2026-10-05
acts.happychef.com 5 2026-05-14 2026-09-11
mcprod-acts.happychef.com 5 2026-05-14 2026-09-11
mcstaging-acts.happychef.com 5 2026-05-10 2026-09-07
news.happychef.com 24 2026-04-20 2026-10-02
*.news.happychef.com 13 2026-04-23 2026-10-02
*.int.happychef.com 16 2026-05-31 2026-09-26
api.int.happychef.com 4 2026-02-06 2026-09-21
www.happychef.com 5 2026-05-14 2026-09-11

Programmatic access: API GET /v1/hosts/happychef.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/happychef.com.