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.

4 hosts · 323 ms

HostCertsFirst seenLast seen
cloud.mail.vivo.com.br 2 2025-10-13 2026-09-30
image.mail.vivo.com.br 3 2026-02-12 2026-09-07
click.mail.vivo.com.br 2 2025-10-12 2026-09-29
view.mail.vivo.com.br 2 2025-10-12 2026-09-29

Programmatic access: API GET /v1/hosts/mail.vivo.com.br (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/mail.vivo.com.br.