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.

50 hosts · 273 ms

HostCertsFirst seenLast seen
birchgold.com 20 2026-04-18 2026-09-08
*.birchgold.com 15 2026-04-18 2026-09-08
freekit2.birchgold.com 16 2026-05-01 2026-08-28
infokit2.birchgold.com 5 2026-05-03 2026-08-31
staging2.infokit2.birchgold.com 5 2026-05-26 2026-09-23
www.staging2.infokit2.birchgold.com 5 2026-05-26 2026-09-23
links.infokit2.birchgold.com 2 2026-09-08 2026-09-08
www.infokit2.birchgold.com 5 2026-05-03 2026-08-31
www2.birchgold.com 17 2026-05-27 2026-09-23
staging3.birchgold.com 5 2026-05-02 2026-08-30
www.staging3.birchgold.com 5 2026-05-02 2026-08-30
infokit3.birchgold.com 5 2026-05-08 2026-09-05
www.infokit3.birchgold.com 5 2026-05-08 2026-09-05
staging4.birchgold.com 5 2026-05-10 2026-09-07
www.staging4.birchgold.com 5 2026-05-10 2026-09-07
intranetbackend.birchgold.com 3 2026-04-15 2026-06-14
dashboard.birchgold.com 3 2026-07-13 2026-09-12
e.birchgold.com 24 2026-05-26 2026-10-04
*.e.birchgold.com 12 2026-06-04 2026-10-04
signature.birchgold.com 2 2026-10-06 2026-10-06
sig.birchgold.com 6 2026-06-02 2026-09-30
bgai.birchgold.com 1 2026-05-18 2026-05-18
bgmrai.birchgold.com 2 2025-09-05 2026-09-07
email.ci.birchgold.com 3 2026-06-23 2026-10-07
referral.birchgold.com 20 2026-04-29 2026-08-25
cloud.email.birchgold.com 1 2026-02-03 2026-02-03
image.email.birchgold.com 3 2026-03-09 2026-07-27
click.email.birchgold.com 1 2026-02-03 2026-02-03
view.email.birchgold.com 1 2026-02-03 2026-02-03
ll.birchgold.com 2 2026-08-28 2026-08-28
video.birchgold.com 5 2026-05-17 2026-09-15
compliance.app.birchgold.com 3 2026-07-27 2026-09-26
coordinator.app.birchgold.com 1 2026-09-14 2026-09-14
reviews.app.birchgold.com 5 2026-07-02 2026-09-08
content.app.birchgold.com 6 2026-06-28 2026-09-08
ftp.birchgold.com 5 2026-05-21 2026-09-18
calendar.birchgold.com 6 2026-04-15 2026-09-03
metaserver.birchgold.com 3 2026-05-25 2026-09-10
images.birchgold.com 5 2026-05-17 2026-09-16
www.images.birchgold.com 5 2026-05-17 2026-09-16
careers.birchgold.com 4 2026-04-11 2026-08-09
reports.birchgold.com 16 2026-06-07 2026-10-03
intranet.birchgold.com 4 2026-04-15 2026-09-15
freekit.birchgold.com 10 2026-05-03 2026-08-29
freeinfokit.birchgold.com 3 2026-09-08 2026-09-08
content.birchgold.com 12 2026-05-30 2026-09-25
account.birchgold.com 14 2026-05-22 2026-09-17
test.birchgold.com 10 2026-05-30 2026-09-25
links.v.birchgold.com 2 2026-09-08 2026-09-08
www.birchgold.com 5 2026-05-03 2026-08-31

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