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.

6 hosts · 394 ms

HostCertsFirst seenLast seenDNS
textmagic.com 16 2026-05-22 2026-09-17 ok
*.textmagic.com 16 2026-05-22 2026-09-17 —
touchpoint-staging.textmagic.com 10 2026-04-22 2026-08-18 ok
careers.textmagic.com 9 2026-05-26 2026-09-23 ok
status.textmagic.com 6 2026-04-29 2026-09-19 ok
touchpoint.textmagic.com 12 2026-04-22 2026-08-18 ok

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