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.

14 hosts · 352 ms

HostCertsFirst seenLast seenDNS
unrl.com 22 2026-04-18 2026-09-29 ok
*.unrl.com 4 2026-06-24 2026-08-24 —
trk.send.unrl.com 6 2026-05-21 2026-09-16 ok
barstool.unrl.com 1 2026-03-18 2026-03-18 ok
men.unrl.com 1 2026-03-18 2026-03-18 ok
women.unrl.com 1 2026-03-18 2026-03-18 ok
qr.unrl.com 7 2026-07-30 2026-09-27 ok
vikings.unrl.com 1 2026-03-18 2026-03-18 ok
mens.unrl.com 1 2026-03-18 2026-03-18 ok
womens.unrl.com 1 2026-03-18 2026-03-18 ok
returns.unrl.com 1 2026-03-18 2026-03-18 ok
careers.unrl.com 16 2026-01-29 2026-10-05 ok
account.unrl.com 18 2026-04-17 2026-09-28 ok
www.unrl.com 17 2026-04-19 2026-10-01 ok

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