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.

6 hosts · 312 ms

HostCertsFirst seenLast seenDNS
mg.service.johnstonandmurphy-email.com 4 2026-04-17 2026-08-15 ok
d.news.johnstonandmurphy-email.com 10 2026-05-20 2026-09-15 ok
e.news.johnstonandmurphy-email.com 14 2026-05-22 2026-09-18 ok
se.news.johnstonandmurphy-email.com 14 2026-05-20 2026-09-16 ok
mg.news.johnstonandmurphy-email.com 4 2026-04-17 2026-08-15 ok
forms.news.johnstonandmurphy-email.com 9 2026-05-31 2026-09-26 ok

Programmatic access, with DNS A records: API GET /v1/hosts/johnstonandmurphy-email.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/johnstonandmurphy-email.com.