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.

9 hosts · 280 ms

HostCertsFirst seenLast seenDNS
applemusic.com 13 2026-04-12 2026-10-05 ok
carpoolkaraoke.applemusic.com 6 2026-02-18 2026-07-02 ok
tools.applemusic.com 3 2026-04-09 2026-08-03 ok
events.applemusic.com 2 2026-02-12 2026-07-02 ok
connect.applemusic.com 3 2026-04-09 2026-08-03 ok
tv.applemusic.com 2 2026-02-12 2026-07-02 ok
new.applemusic.com 4 2025-10-21 2026-08-13 ok
www.applemusic.com 13 2026-04-12 2026-10-05 ok
try.applemusic.com 3 2026-04-09 2026-08-03 ok

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