Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

20 hosts · 178 ms

HostCertsFirst seenLast seen
borisfx.com 8 2026-04-24 2026-08-23
*.borisfx.com 2 2026-04-25 2026-05-24
www3.borisfx.com 8 2026-04-24 2026-08-21
aotc.borisfx.com 10 2026-04-23 2026-08-19
backend.borisfx.com 7 2026-04-27 2026-08-26
bfxlivefrontend.borisfx.com 7 2026-05-17 2026-09-16
store.borisfx.com 6 2026-04-24 2026-08-23
swupdate.borisfx.com 1 2026-01-26 2026-01-26
bfxlive.borisfx.com 1 2025-12-28 2025-12-28
blog.borisfx.com 14 2025-06-14 2026-08-20
sm.borisfx.com 4 2026-06-09 2026-10-07
load.sm.borisfx.com 11 2026-06-01 2026-09-28
forum.borisfx.com 14 2026-04-25 2026-09-22
cdn.borisfx.com 3 2025-11-05 2026-10-06
postproduction.borisfx.com 10 2026-06-11 2026-10-07
fcp.borisfx.com 10 2026-04-23 2026-08-20
files.borisfx.com 2 2026-03-08 2026-07-24
support.borisfx.com 9 2026-05-28 2026-09-29
podcast.borisfx.com 10 2026-04-19 2026-10-06
vfx.borisfx.com 6 2026-04-23 2026-08-20

Programmatic access: API GET /v1/hosts/borisfx.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/borisfx.com.