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.

6 hosts · 226 ms

HostCertsFirst seenLast seen
altezzatravel.com 23 2026-05-06 2026-09-04
*.altezzatravel.com 23 2026-05-06 2026-09-04
academy-api.altezzatravel.com 4 2026-04-16 2026-08-14
turaco.altezzatravel.com 15 2026-05-22 2026-09-19
load.turaco.altezzatravel.com 16 2026-05-22 2026-09-18
academy.altezzatravel.com 4 2026-04-16 2026-08-14

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