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.

11 hosts · 260 ms

HostCertsFirst seenLast seenDNS
trespa.com 27 2026-04-15 2026-09-25 ok
*.trespa.com 21 2026-05-10 2026-09-25 —
media.trespa.com 1 2025-11-03 2025-11-03 ok
www.media.trespa.com 1 2025-11-03 2025-11-03 nxdomain
magazine.trespa.com 2 2026-05-10 2026-05-10 ok
portal.trespa.com 1 2026-04-10 2026-04-10 ok
shop.trespa.com 6 2026-05-28 2026-09-30 ok
link.izeongratis.trespa.com 5 2026-05-01 2026-08-29 ok
careers.trespa.com 1 2025-12-17 2025-12-17 ok
mta-sts.trespa.com 3 2026-05-24 2026-08-19 ok
www.trespa.com 6 2026-04-15 2026-08-17 ok

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