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.

8 hosts · 306 ms

HostCertsFirst seenLast seenDNS
prostylingtools.com 21 2026-04-15 2026-09-29 ok
*.prostylingtools.com 10 2026-06-01 2026-09-29 —
wholesale.prostylingtools.com 15 2026-04-14 2026-09-26 ok
www.wholesale.prostylingtools.com 15 2026-05-11 2026-09-21 ok
wh.prostylingtools.com 15 2026-04-12 2026-09-26 ok
www.wh.prostylingtools.com 12 2026-04-11 2026-10-07 ok
account.prostylingtools.com 14 2026-04-18 2026-09-29 ok
www.prostylingtools.com 14 2026-04-14 2026-09-25 ok

Programmatic access, with DNS A records: API GET /v1/hosts/prostylingtools.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/prostylingtools.com.