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.

15 hosts · 318 ms

HostCertsFirst seenLast seenDNS
brandsecurity.gmo 15 2026-03-02 2026-09-28 ok
*.brandsecurity.gmo 15 2026-03-02 2026-09-28 —
mail.rua.brandsecurity.gmo 1 2026-09-10 2026-09-10 ok
brandtld.brandsecurity.gmo 8 2026-05-10 2026-09-02 ok
watch.brandsecurity.gmo 2 2025-07-04 2026-07-27 ok
caio.brandsecurity.gmo 5 2026-04-14 2026-09-28 ok
gbs.brandsecurity.gmo 1 2025-09-26 2025-09-26 ok
t-yamashita.agents.brandsecurity.gmo 1 2026-09-10 2026-09-10 ok
trust.brandsecurity.gmo 1 2026-05-18 2026-05-18 ok
stg.trust.brandsecurity.gmo 3 2026-05-18 2026-09-03 ok
mcp.stg.trust.brandsecurity.gmo 3 2026-05-18 2026-09-02 ok
mcp.trust.brandsecurity.gmo 3 2026-05-18 2026-09-02 ok
srv.brandsecurity.gmo 12 2026-04-13 2026-08-12 ok
cdn-surveillance.srv.brandsecurity.gmo 4 2026-04-14 2026-08-12 ok
auth.srv.brandsecurity.gmo 2 2025-06-16 2026-05-17 ok

Programmatic access, with DNS A records: API GET /v1/hosts/brandsecurity.gmo (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/brandsecurity.gmo.