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 · 256 ms

HostCertsFirst seenLast seen
flyairshare.com 20 2026-04-23 2026-08-19
*.flyairshare.com 2 2025-07-03 2026-06-03
go.flyairshare.com 9 2026-04-19 2026-09-16
sales.flyairshare.com 5 2026-05-08 2026-09-05
careers.flyairshare.com 19 2026-05-24 2026-09-19
www.careers.flyairshare.com 16 2026-05-24 2026-09-19
astroreports.flyairshare.com 12 2026-05-17 2026-07-17
mta-sts.flyairshare.com 5 2026-05-16 2026-09-13
www.flyairshare.com 12 2026-04-23 2026-08-19

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