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 · 268 ms

HostCertsFirst seenLast seenDNS
flylance.com 11 2026-05-17 2026-09-26 ok
*.flylance.com 11 2026-05-17 2026-09-26 —
hubble.flylance.com 8 2026-04-21 2026-08-23 ok
api.flylance.com 5 2026-05-27 2026-09-24 ok
cdn.flylance.com 8 2026-04-20 2026-08-15 ok
mcp.flylance.com 4 2026-04-14 2026-08-12 ok
arcop.flylance.com 2 2026-08-31 2026-08-31 ok
mirror.flylance.com 10 2026-04-29 2026-08-31 ok
atlas.flylance.com 5 2026-05-27 2026-09-24 ok
careers.flylance.com 9 2026-04-18 2026-09-18 ok
sw.flylance.com 3 2025-10-13 2026-09-13 ok

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