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.

18 hosts · 273 ms

HostCertsFirst seenLast seen
pure.app 47 2026-04-28 2026-10-08
*.pure.app 18 2026-05-22 2026-09-29
email.welcome.pure.app 5 2026-04-24 2026-08-22
mjtrack.pure.app 5 2026-06-06 2026-10-03
safety-signal.pure.app 8 2026-05-19 2026-09-27
email.pure.app 5 2026-04-24 2026-08-22
poll.pure.app 10 2026-04-30 2026-09-27
email.prco.pure.app 5 2026-06-08 2026-10-06
email.promo.pure.app 5 2026-04-24 2026-08-22
cityguides.pure.app 10 2026-05-17 2026-09-27
queens.pure.app 8 2026-05-11 2026-09-27
press.pure.app 2 2026-03-04 2026-07-20
payments.pure.app 5 2026-05-24 2026-09-21
email.news.pure.app 5 2026-04-24 2026-08-22
email.account.pure.app 5 2026-05-22 2026-09-19
email.test.pure.app 4 2026-04-21 2026-08-19
www.pure.app 12 2026-06-08 2026-10-06
joy.pure.app 8 2026-06-10 2026-09-27

Programmatic access: API GET /v1/hosts/pure.app (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/pure.app.