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.

9 hosts · 290 ms

HostCertsFirst seenLast seenDNS
johnstonmurphy.com 18 2026-04-28 2026-08-25 ok
staging.johnstonmurphy.com 14 2026-04-19 2026-08-15 ok
s.johnstonmurphy.com 16 2026-05-23 2026-09-19 ok
d.news.johnstonmurphy.com 2 2026-08-12 2026-08-12 ok
e.news.johnstonmurphy.com 2 2026-08-12 2026-08-12 ok
se.news.johnstonmurphy.com 2 2026-08-12 2026-08-12 ok
development.johnstonmurphy.com 12 2026-05-19 2026-09-14 ok
sv.johnstonmurphy.com 4 2026-03-27 2026-09-14 ok
www.johnstonmurphy.com 14 2026-04-21 2026-08-24 ok

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