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 · 284 ms

HostCertsFirst seenLast seenDNS
fling.com 11 2025-12-30 2026-08-28 ok
*.fling.com 11 2025-12-30 2026-08-28 —
links.notice.fling.com 5 2026-04-27 2026-08-27 ok
live.fling.com 6 2026-04-19 2026-08-15 ok
blog.fling.com 5 2026-05-22 2026-09-20 ok
onelink.fling.com 14 2026-04-21 2026-08-17 ok
promos.fling.com 6 2026-05-23 2026-09-20 ok
mail5.members.fling.com 5 2026-06-06 2026-10-04 ok
mail6.members.fling.com 4 2026-06-06 2026-10-05 ok
mail7.members.fling.com 4 2026-06-06 2026-10-04 ok
mail8.members.fling.com 5 2026-06-06 2026-10-04 ok
clk.members.fling.com 5 2026-05-23 2026-09-20 ok
alerts.fling.com 4 2026-06-09 2026-10-07 ok

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