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.

27 hosts · 315 ms

HostCertsFirst seenLast seenDNS
zip.com 71 2026-04-15 2026-10-02 ok
*.zip.com 29 2026-04-15 2026-10-02 —
emea.zip.com 8 2026-07-22 2026-09-19 nodata
*.emea.zip.com 8 2026-07-22 2026-09-19 —
*.qa.zip.com 11 2026-04-15 2026-08-26 —
omni-embed.zip.com 2 2026-07-24 2026-07-24 ok
partner.institute.zip.com 4 2026-07-22 2026-07-22 ok
webhook-staging.zip.com 1 2026-04-15 2026-04-15 ok
*.staging.zip.com 11 2026-04-15 2026-08-26 —
api.zip.com 8 2026-05-07 2026-09-02 ok
qa-api.zip.com 8 2026-05-07 2026-09-02 ok
*.qa-api.zip.com 8 2026-05-07 2026-09-02 —
staging-api.zip.com 8 2026-05-05 2026-08-31 ok
*.staging-api.zip.com 8 2026-05-05 2026-08-31 —
next-api.zip.com 8 2026-05-05 2026-08-31 ok
*.next-api.zip.com 8 2026-05-05 2026-08-31 —
*.api.zip.com 8 2026-05-07 2026-09-02 —
webhook.zip.com 1 2026-04-15 2026-04-15 ok
em.zip.com 10 2026-04-13 2026-08-10 ok
webhook-staging-mtls.zip.com 2 2026-04-15 2026-05-14 ok
webhook-mtls.zip.com 2 2026-04-15 2026-05-14 ok
events.zip.com 1 2026-08-13 2026-08-13 ok
status.zip.com 1 2026-09-23 2026-09-23 ok
*.next-preview-eu.zip.com 6 2026-05-14 2026-09-09 —
*.next-preview.zip.com 11 2026-04-15 2026-08-26 —
*.deploy-preview.zip.com 11 2026-04-15 2026-08-26 —
ux.zip.com 6 2026-05-15 2026-09-12 ok

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