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.

13 hosts · 265 ms

HostCertsFirst seenLast seenDNS
taro.com 28 2025-08-24 2026-09-29 ok
*.taro.com 19 2026-05-14 2026-09-29 —
zb05558095.taro.com 10 2026-05-14 2026-09-09 ok
ff37d0ca-cb0c-4110-8e4d-04613437b996.taro.com 12 2026-05-14 2026-09-09 ok
em209089.taro.com 10 2026-05-14 2026-09-09 ok
beta.taro.com 12 2026-05-14 2026-09-09 ok
webmail.taro.com 10 2026-05-14 2026-09-09 ok
ae.crm.taro.com 13 2026-05-01 2026-09-09 ok
enterpriseregistration.taro.com 10 2026-05-14 2026-09-09 ok
autodiscover.taro.com 6 2026-05-14 2026-09-09 ok
jobs.taro.com 10 2026-05-14 2026-09-09 ok
enterpriseenrollment.taro.com 10 2026-05-14 2026-09-09 ok
www.taro.com 11 2025-08-24 2026-09-10 ok

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