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.

9 hosts · 211 ms

HostCertsFirst seenLast seen
airbase.com 16 2026-05-08 2026-09-03
*.airbase.com 16 2026-05-08 2026-09-03
info.airbase.com 10 2026-05-16 2026-09-11
partners.airbase.com 4 2026-04-20 2026-08-18
tours.airbase.com 5 2026-05-08 2026-09-08
status.airbase.com 6 2026-05-15 2026-09-21
www.airbase.com 8 2026-05-13 2026-09-08
uat-www.airbase.com 10 2026-05-08 2026-09-03
try.airbase.com 7 2026-05-20 2026-09-15

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