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.

25 hosts · 400 ms

HostCertsFirst seenLast seenDNS
swansonvitamins.com 34 2026-04-13 2026-09-29 ok
*.swansonvitamins.com 12 2026-04-13 2026-08-09 —
dev-media.swansonvitamins.com 10 2026-04-28 2026-09-25 ok
legacy-media.swansonvitamins.com 10 2026-04-28 2026-09-25 nxdomain
pre-prod.swansonvitamins.com 8 2026-05-05 2026-09-01 ok
d.e.swansonvitamins.com 18 2026-05-10 2026-09-06 ok
e.e.swansonvitamins.com 20 2026-05-10 2026-09-05 ok
se.e.swansonvitamins.com 16 2026-05-10 2026-09-05 ok
mg.e.swansonvitamins.com 5 2026-05-11 2026-09-08 ok
capig.swansonvitamins.com 4 2026-04-25 2026-06-24 ok
external-testing.swansonvitamins.com 12 2026-05-25 2026-09-20 ok
shopify-testing.swansonvitamins.com 14 2026-05-24 2026-09-20 ok
ai.swansonvitamins.com 2 2026-08-30 2026-08-30 ok
link.swansonvitamins.com 2 2026-06-03 2026-06-03 ok
ingrain.swansonvitamins.com 8 2026-05-14 2026-07-29 ok
amp.swansonvitamins.com 12 2026-04-25 2026-08-21 ok
shop.swansonvitamins.com 2 2026-08-26 2026-08-26 ok
forms.swansonvitamins.com 6 2026-06-25 2026-08-23 ok
redirects.swansonvitamins.com 10 2026-05-28 2026-09-23 ok
mg.t.swansonvitamins.com 5 2026-05-11 2026-09-08 ok
account.swansonvitamins.com 5 2026-09-30 2026-09-30 ok
cert-test.swansonvitamins.com 8 2026-05-17 2026-09-12 ok
shopify-dev.swansonvitamins.com 16 2026-05-30 2026-09-26 ok
www.swansonvitamins.com 25 2026-04-28 2026-09-27 ok
legacy.swansonvitamins.com 19 2026-04-28 2026-09-25 ok

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