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 · 320 ms

HostCertsFirst seenLast seenDNS
durangoboots.com 14 2026-05-20 2026-09-29 ok
send.durangoboots.com 5 2026-04-23 2026-06-21 nxdomain
manage.durangoboots.com 7 2026-04-24 2026-06-22 nxdomain
i.durangoboots.com 3 2026-07-09 2026-09-07 ok
sgtm.durangoboots.com 3 2026-05-20 2026-09-08 ok
pugvm.durangoboots.com 11 2026-06-02 2026-09-28 ok
metrics.durangoboots.com 5 2026-04-20 2026-09-28 ok
pages.durangoboots.com 10 2026-04-24 2026-06-22 nxdomain
www.durangoboots.com 16 2026-05-19 2026-10-01 ok

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