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.

11 hosts · 305 ms

HostCertsFirst seenLast seenDNS
wingbuddy.com 15 2026-05-23 2026-09-18 ok
*.wingbuddy.com 15 2026-05-23 2026-09-18 —
website-service.wingbuddy.com 6 2026-04-14 2026-09-23 ok
qa-website-service.wingbuddy.com 4 2026-05-30 2026-09-16 ok
stg-website-service.wingbuddy.com 8 2026-04-11 2026-09-16 ok
dev-website-service.wingbuddy.com 5 2026-04-07 2026-09-12 ok
wb-helper-stg.wingbuddy.com 1 2026-09-03 2026-09-03 ok
wb-helper.wingbuddy.com 2 2026-09-11 2026-09-11 ok
wbsgmt.wingbuddy.com 12 2026-05-17 2026-09-14 ok
assistant.wingbuddy.com 1 2026-10-02 2026-10-02 ok
wb-helper-dev.wingbuddy.com 1 2026-09-03 2026-09-03 ok

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