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.

12 hosts · 407 ms

HostCertsFirst seenLast seenDNS
outskirtspress.com 2 2026-03-20 2026-09-04 ok
test3a.outskirtspress.com 5 2026-04-25 2026-08-23 ok
rwd.outskirtspress.com 5 2026-04-25 2026-08-23 ok
publishing.outskirtspress.com 4 2026-04-08 2026-08-30 ok
multimedia.publishing.outskirtspress.com 4 2026-04-08 2026-08-30 ok
www.publishing.outskirtspress.com 4 2026-04-08 2026-08-30 ok
accounting.outskirtspress.com 5 2026-04-30 2026-08-28 ok
publish.outskirtspress.com 1 2025-10-31 2025-10-31 ok
www.publish.outskirtspress.com 1 2025-10-31 2025-10-31 nxdomain
vpn.outskirtspress.com 3 2025-10-01 2026-09-21 ok
www.vpn.outskirtspress.com 3 2025-10-01 2026-09-21 nxdomain
www.outskirtspress.com 2 2026-03-20 2026-09-04 ok

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