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 · 361 ms

HostCertsFirst seenLast seenDNS
megaplex.com 22 2026-02-12 2026-10-05 ok
*.megaplex.com 22 2026-02-12 2026-10-05 —
store.megaplex.com 14 2026-05-25 2026-10-06 ok
digital-api.megaplex.com 22 2026-05-23 2026-09-19 ok
*.email.megaplex.com 2 2026-03-04 2026-07-20 —
cdn.email.megaplex.com 2 2026-03-18 2026-08-18 ok
www.email.megaplex.com 5 2026-05-26 2026-09-23 ok
megapass.megaplex.com 21 2026-05-23 2026-09-18 ok
cms-api-megapass.megaplex.com 14 2026-05-22 2026-09-18 ok
digital-api.sandbox.megaplex.com 12 2026-05-31 2026-09-26 ok
megapass.sandbox.megaplex.com 12 2026-05-22 2026-09-17 ok
cms-api-megapass.sandbox.megaplex.com 12 2026-05-22 2026-09-17 ok

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