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.

15 hosts · 326 ms

Download CSV
HostCertsFirst seenLast seen
zapo.com 53 2026-05-12 2026-10-03
*.zapo.com 35 2026-05-12 2026-09-20
website.zapo.com 5 2026-09-27 2026-09-27
*.website.zapo.com 3 2026-09-27 2026-09-27
api.staging.zapo.com 21 2026-04-28 2026-09-15
generated.api.staging.zapo.com 13 2026-05-29 2026-09-24
www.generated.api.staging.zapo.com 3 2026-06-01 2026-08-10
www.api.staging.zapo.com 3 2026-06-01 2026-08-09
admin.staging.zapo.com 6 2026-05-20 2026-05-20
lp.staging.zapo.com 19 2026-05-03 2026-09-18
mail.zapo.com 21 2026-04-23 2026-09-26
staging.app.zapo.com 1 2026-09-11 2026-09-11
assets.zapo.com 16 2026-04-22 2026-08-18
support.zapo.com 16 2026-05-23 2026-09-19
www.zapo.com 19 2026-05-16 2026-10-03

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