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 · 400 ms

HostCertsFirst seenLast seenDNS
aloha.com 17 2025-10-08 2026-09-27 ok
wholesale.aloha.com 14 2026-05-20 2026-09-28 ok
ss3.zone.aloha.com 2 2026-09-30 2026-09-30 ok
trk.aloha.com 1 2026-01-31 2026-01-31 ok
cbfvq.aloha.com 11 2026-06-01 2026-09-27 ok
offer.aloha.com 8 2026-04-19 2026-08-16 ok
rs.aloha.com 5 2026-05-11 2026-09-07 ok
partners.aloha.com 5 2026-04-23 2026-08-26 ok
www.aloha.com 15 2026-05-17 2026-09-26 ok

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