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.

10 hosts · 195 ms

HostCertsFirst seenLast seenDNS
liftwithboystown.org 3 2025-06-19 2026-07-13 ok
staging.liftwithboystown.org 2 2026-05-14 2026-09-26 ok
cloud.resources.liftwithboystown.org 1 2025-10-03 2025-10-03 nxdomain
image.resources.liftwithboystown.org 5 2025-10-01 2026-01-27 ok
click.resources.liftwithboystown.org 1 2025-10-03 2025-10-03 nxdomain
view.resources.liftwithboystown.org 1 2025-10-03 2025-10-03 nxdomain
content.liftwithboystown.org 5 2026-05-20 2026-09-17 ok
tst.liftwithboystown.org 2 2026-05-17 2026-09-30 ok
edu.liftwithboystown.org 16 2026-05-13 2026-09-07 ok
www.liftwithboystown.org 6 2025-06-19 2026-10-03 ok

Programmatic access, with DNS A records: API GET /v1/hosts/liftwithboystown.org (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/liftwithboystown.org.