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 · 326 ms

HostCertsFirst seenLast seenDNS
shearcomfort.com 11 2025-07-23 2026-09-17 ok
legacy2.shearcomfort.com 5 2026-04-28 2026-08-18 ok
data.shearcomfort.com 2 2025-08-27 2026-07-28 ok
e.shearcomfort.com 8 2026-05-04 2026-09-19 nodata
*.e.shearcomfort.com 8 2026-05-04 2026-09-19 —
trk.e.shearcomfort.com 5 2026-05-06 2026-09-03 ok
jhtle.shearcomfort.com 10 2026-06-06 2026-10-02 ok
blog.shearcomfort.com 3 2025-10-16 2026-07-14 ok
i.shearcomfort.com 3 2026-05-02 2026-08-21 ok
secure-admin.shearcomfort.com 5 2026-04-28 2026-08-18 ok
dealer.shearcomfort.com 1 2026-01-19 2026-01-19 ok
support.shearcomfort.com 4 2026-04-19 2026-08-17 ok
csv.shearcomfort.com 2 2025-06-24 2026-05-25 ok
www.shearcomfort.com 10 2025-07-22 2026-09-17 ok
legacy.shearcomfort.com 5 2026-04-28 2026-08-18 ok

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