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.

9 hosts · 258 ms

HostCertsFirst seenLast seen
afponline.org 13 2026-05-13 2026-10-10
*.afponline.org 13 2026-05-13 2026-10-10
eweb.afponline.org 2 2025-09-17 2026-09-11
dynamic.afponline.org 15 2026-06-06 2026-10-03
marketplace.afponline.org 12 2026-05-08 2026-09-03
link.afponline.org 5 2026-05-08 2026-09-05
apollo.afponline.org 9 2026-04-18 2026-09-28
careercenter.afponline.org 14 2026-04-27 2026-09-17
mta-sts.afponline.org 4 2026-05-13 2026-10-02

Programmatic access: API GET /v1/hosts/afponline.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/afponline.org.