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 · 293 ms

HostCertsFirst seenLast seenDNS
purisaki.com 23 2026-05-12 2026-09-22 ok
*.purisaki.com 14 2026-05-27 2026-09-22 —
click.send.purisaki.com 6 2026-06-30 2026-08-28 ok
bounces.send.purisaki.com 6 2026-06-30 2026-08-28 ok
images.send.purisaki.com 10 2026-05-12 2026-09-07 ok
info.purisaki.com 10 2026-05-12 2026-09-07 ok
click.info.purisaki.com 6 2026-06-30 2026-08-28 ok
bounces.info.purisaki.com 6 2026-06-30 2026-08-28 ok
tracktor.purisaki.com 10 2026-05-12 2026-09-08 ok
itlinks.purisaki.com 10 2026-05-12 2026-09-08 ok
mta-sts.purisaki.com 6 2026-06-19 2026-08-17 ok
support.purisaki.com 13 2026-05-18 2026-09-13 ok
www.purisaki.com 10 2026-05-12 2026-09-07 ok

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