Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

7 hosts · 237 ms

HostCertsFirst seenLast seenDNS
medshadow.org 16 2026-05-15 2026-09-10 ok
subscribe.medshadow.org 12 2026-04-28 2026-08-25 ok
email.medshadow.org 5 2026-06-01 2026-09-28 ok
petition.medshadow.org 5 2026-04-25 2026-08-25 ok
shop.medshadow.org 15 2026-04-27 2026-09-05 ok
www.medshadow.org 14 2026-05-14 2026-09-09 ok
community.medshadow.org 4 2026-04-19 2026-08-19 ok

Programmatic access, with DNS A records: API GET /v1/hosts/medshadow.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/medshadow.org.