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.

7 hosts · 214 ms

HostCertsFirst seenLast seen
ashanderie.com 13 2026-05-15 2026-09-24
exchange.ashanderie.com 10 2026-05-16 2026-09-11
blog.ashanderie.com 18 2026-05-19 2026-09-30
i.ashanderie.com 4 2026-04-29 2026-08-15
jtknl.ashanderie.com 10 2026-04-29 2026-08-25
account.ashanderie.com 13 2026-05-02 2026-09-12
www.ashanderie.com 17 2026-05-15 2026-09-27

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