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.

12 hosts · 277 ms

HostCertsFirst seenLast seenDNS
serasa.com.br 53 2026-01-11 2026-10-05 ok
*.serasa.com.br 77 2026-01-11 2026-10-05 —
sitenet19.serasa.com.br 1 2026-01-05 2026-01-05 ok
ajuda.serasa.com.br 5 2026-05-18 2026-09-15 ok
testecadeia.serasa.com.br 1 2026-09-02 2026-09-02 nxdomain
cloud.suaconta.serasa.com.br 3 2025-08-24 2026-08-12 ok
image.suaconta.serasa.com.br 2 2026-02-23 2026-02-23 ok
teste.serasa.com.br 2 2026-08-28 2026-08-28 nxdomain
api-auth.serasa.com.br 27 2026-01-11 2026-09-30 ok
*.api.serasa.com.br 2 2026-04-16 2026-09-16 —
click.info.serasa.com.br 5 2026-05-06 2026-09-03 ok
conectaseguros.serasa.com.br 20 2026-05-06 2026-09-29 ok

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