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 · 237 ms

HostCertsFirst seenLast seenDNS
morningsave.com 2 2026-03-09 2026-07-02 ok
*.morningsave.com 3 2026-05-24 2026-09-10 —
trk2.morningsave.com 15 2026-04-10 2026-10-05 ok
static.morningsave.com 1 2026-07-02 2026-07-02 ok
trk.morningsave.com 2 2025-08-15 2026-07-15 ok
trk.mail.morningsave.com 9 2026-04-09 2026-10-03 ok
shop.morningsave.com 7 2026-04-21 2026-09-18 ok
tagmanager.morningsave.com 1 2026-04-19 2026-04-19 ok
www.morningsave.com 2 2026-03-09 2026-07-02 ok

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