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.

8 hosts · 283 ms

HostCertsFirst seenLast seenDNS
dominos.com.tw 5 2026-01-15 2026-09-30 ok
*.dominos.com.tw 5 2026-01-15 2026-09-30 —
click.dominos.com.tw 3 2026-05-07 2026-07-22 ok
l.dominos.com.tw 4 2026-06-04 2026-10-02 ok
signup.vip.dominos.com.tw 1 2025-12-30 2025-12-30 ok
assets.vip.dominos.com.tw 1 2025-12-11 2025-12-11 ok
miassets.vip.dominos.com.tw 1 2026-02-02 2026-02-02 ok
analytics.dominos.com.tw 3 2026-05-08 2026-08-27 ok

Programmatic access, with DNS A records: API GET /v1/hosts/dominos.com.tw (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/dominos.com.tw.