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.

19 hosts · 267 ms

HostCertsFirst seenLast seen
apfa.org 8 2026-05-21 2026-09-25
*.apfa.org 8 2026-05-21 2026-09-25
sbc1.apfa.org 4 2026-04-19 2026-05-19
login-prod.apfa.org 14 2026-05-04 2026-08-30
remote.apfa.org 2 2026-04-19 2026-04-19
link.apfa.org 3 2026-06-11 2026-08-19
memberlink.apfa.org 1 2026-05-14 2026-05-14
auth0.memberlink.apfa.org 1 2025-11-12 2025-11-12
test.memberlink.apfa.org 2 2026-03-12 2026-09-23
ulink.apfa.org 2 2025-07-30 2026-07-31
test.ulink.apfa.org 2 2026-03-12 2026-09-23
www.ulink.apfa.org 2 2025-07-30 2026-07-31
learn.apfa.org 7 2026-04-29 2026-09-29
shop.apfa.org 18 2026-04-16 2026-09-28
hq.apfa.org 2 2025-08-14 2026-09-15
tripremovals.apfa.org 1 2025-11-12 2025-11-12
test.tripremovals.apfa.org 1 2026-04-27 2026-04-27
ems.apfa.org 2 2026-07-02 2026-07-02
login-dev.apfa.org 10 2026-04-25 2026-08-23

Programmatic access: API GET /v1/hosts/apfa.org (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/apfa.org.