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 · 214 ms

HostCertsFirst seenLast seenDNS
actssocial.com 23 2026-05-09 2026-09-05 ok
*.actssocial.com 21 2026-05-09 2026-09-05 —
media.actssocial.com 2 2026-09-18 2026-09-18 ok
upload.actssocial.com 2 2026-05-14 2026-05-14 nxdomain
share.actssocial.com 3 2026-05-26 2026-08-10 ok
merch.actssocial.com 15 2026-05-09 2026-09-22 ok
mailtrack.actssocial.com 5 2026-06-03 2026-10-03 ok
links.actssocial.com 2 2026-05-14 2026-05-15 ok
merchaccount.actssocial.com 15 2026-05-12 2026-09-21 ok
support.actssocial.com 5 2026-05-18 2026-09-15 ok
www.actssocial.com 2 2026-05-18 2026-05-18 ok
pay.actssocial.com 6 2026-05-08 2026-09-03 ok
ministry.actssocial.com 2 2026-07-14 2026-09-07 ok

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