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.

18 hosts · 264 ms

HostCertsFirst seenLast seenDNS
thesaasypeople.com 23 2026-05-08 2026-09-22 ok
*.thesaasypeople.com 15 2026-05-08 2026-09-22 —
checkout-usa.thesaasypeople.com 2 2026-05-03 2026-05-03 ok
watch.thesaasypeople.com 10 2026-05-18 2026-09-14 ok
wiki.thesaasypeople.com 9 2026-05-24 2026-09-20 ok
email.thesaasypeople.com 8 2026-04-22 2026-08-19 ok
links.thesaasypeople.com 5 2026-05-19 2026-09-18 ok
testimonials.thesaasypeople.com 12 2026-05-22 2026-09-17 ok
screens.thesaasypeople.com 5 2026-05-08 2026-09-05 ok
campaigns.thesaasypeople.com 17 2026-04-10 2026-10-04 ok
www.campaigns.thesaasypeople.com 12 2026-04-10 2026-10-04 ok
meet.thesaasypeople.com 10 2026-04-13 2026-08-09 ok
intercom-trustpilot.thesaasypeople.com 5 2026-05-24 2026-09-21 ok
support.thesaasypeople.com 5 2026-05-12 2026-09-09 ok
checkout.thesaasypeople.com 7 2026-04-21 2026-08-17 ok
www.thesaasypeople.com 11 2026-05-18 2026-09-14 ok
my.thesaasypeople.com 7 2026-04-25 2026-08-26 ok
security.thesaasypeople.com 10 2026-04-29 2026-08-26 ok

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