Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

16 hosts · 277 ms

HostCertsFirst seenLast seen
capturetheatlas.com 12 2025-10-26 2026-10-08
*.capturetheatlas.com 10 2026-05-24 2026-10-08
1on1.capturetheatlas.com 5 2026-05-30 2026-09-27
focusonchange.capturetheatlas.com 1 2026-10-06 2026-10-06
store.capturetheatlas.com 4 2026-04-14 2026-08-12
calendarpre.capturetheatlas.com 4 2026-06-11 2026-10-09
imgcap.capturetheatlas.com 2 2025-10-26 2026-09-26
apicalendar.capturetheatlas.com 5 2026-04-27 2026-08-25
imagenes.capturetheatlas.com 2 2025-10-26 2026-09-26
js.capturetheatlas.com 2 2025-10-26 2026-09-26
milkywaycalendars.capturetheatlas.com 3 2026-06-10 2026-08-09
css.capturetheatlas.com 2 2025-10-26 2026-09-26
summit.capturetheatlas.com 8 2026-05-25 2026-09-20
gateway.capturetheatlas.com 12 2026-05-15 2026-09-10
academy.capturetheatlas.com 7 2025-10-26 2026-09-26
preacademy.capturetheatlas.com 5 2026-05-25 2026-09-22

Programmatic access: API GET /v1/hosts/capturetheatlas.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/capturetheatlas.com.