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.

10 hosts · 317 ms

HostCertsFirst seenLast seen
humanappeal.me 14 2026-05-09 2026-09-07
*.humanappeal.me 14 2026-05-09 2026-09-07
stage.humanappeal.me 2 2026-03-13 2026-06-16
gazaarchive.humanappeal.me 2 2025-07-02 2026-06-02
fundraising.humanappeal.me 5 2026-04-27 2026-08-25
admin.humanappeal.me 1 2026-02-25 2026-02-25
syriahomes.humanappeal.me 2 2025-07-06 2026-06-06
donations.humanappeal.me 1 2026-10-07 2026-10-07
uat.humanappeal.me 1 2026-07-30 2026-07-30
dev.humanappeal.me 2 2026-02-04 2026-05-27

Programmatic access: API GET /v1/hosts/humanappeal.me (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/humanappeal.me.