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.

15 hosts · 439 ms

HostCertsFirst seenLast seenDNS
hpgbrands.com 7 2026-06-10 2026-09-19 ok
*.hpgbrands.com 8 2026-06-10 2026-09-19 —
dhsync-prod-1.hpgbrands.com 4 2026-06-30 2026-08-29 ok
dhsync1.hpgbrands.com 9 2026-04-14 2026-08-27 ok
svc1.hpgbrands.com 5 2026-05-25 2026-09-23 ok
svc2.hpgbrands.com 5 2026-05-16 2026-09-13 ok
badgewarehouse.hpgbrands.com 3 2026-07-13 2026-07-22 ok
catalog.hpgbrands.com 1 2026-09-01 2026-09-01 ok
link.hpgbrands.com 5 2026-05-28 2026-09-25 ok
helpdesk.hpgbrands.com 10 2026-04-25 2026-08-21 ok
img.email.hpgbrands.com 11 2026-04-20 2026-08-17 ok
r.email.hpgbrands.com 5 2026-04-26 2026-10-03 ok
help.hpgbrands.com 1 2026-09-01 2026-09-01 ok
ithelp.hpgbrands.com 1 2026-09-01 2026-09-01 ok
newsletter.hpgbrands.com 10 2026-04-14 2026-08-10 ok

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