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 · 296 ms

HostCertsFirst seenLast seenDNS
thefrosteam.com 38 2026-05-07 2026-10-04 ok
*.thefrosteam.com 7 2026-05-07 2026-10-04 —
mta-sta.thefrosteam.com 2 2026-07-27 2026-07-27 nxdomain
*.mta-sta.thefrosteam.com 2 2026-07-27 2026-07-27 —
knowledge.thefrosteam.com 12 2026-05-05 2026-08-31 ok
bimi.thefrosteam.com 4 2026-07-14 2026-09-11 ok
*.bimi.thefrosteam.com 4 2026-07-14 2026-09-11 —
go.thefrosteam.com 4 2026-07-14 2026-09-11 ok
mta-sts.thefrosteam.com 7 2026-04-14 2026-09-24 ok
*.mta-sts.thefrosteam.com 4 2026-07-27 2026-09-24 —
account.thefrosteam.com 5 2026-05-12 2026-09-09 ok
text.thefrosteam.com 9 2026-05-23 2026-09-18 ok
www.thefrosteam.com 5 2026-05-08 2026-09-04 ok

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