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.

33 hosts · 230 ms

HostCertsFirst seenLast seen
drdegnan.com 51 2026-04-17 2026-10-04
*.drdegnan.com 15 2026-04-24 2026-08-29
read.drdegnan.com 10 2026-04-24 2026-08-21
shield.drdegnan.com 10 2026-06-04 2026-09-30
unsubscribe.drdegnan.com 2 2026-09-04 2026-09-04
*.unsubscribe.drdegnan.com 2 2026-09-04 2026-09-04
store.drdegnan.com 8 2026-05-22 2026-09-18
lpt-license.drdegnan.com 10 2026-04-30 2026-08-26
blog.drdegnan.com 18 2026-05-30 2026-10-02
watch.drdegnan.com 5 2026-05-23 2026-09-26
bimi.drdegnan.com 16 2026-04-17 2026-08-13
api.drdegnan.com 8 2026-05-05 2026-09-01
book.drdegnan.com 8 2026-04-24 2026-08-20
testimonial.drdegnan.com 11 2026-04-19 2026-08-16
portal.drdegnan.com 8 2026-04-24 2026-08-20
join.drdegnan.com 13 2026-04-21 2026-08-25
learn.drdegnan.com 13 2026-04-13 2026-10-07
app.drdegnan.com 6 2026-05-04 2026-08-30
levelup.drdegnan.com 8 2026-04-22 2026-08-19
pages.drdegnan.com 5 2026-05-29 2026-09-26
twinoaks.drdegnan.com 6 2026-08-06 2026-10-04
*.twinoaks.drdegnan.com 6 2026-08-06 2026-10-04
links.drdegnan.com 11 2026-06-08 2026-10-05
mytools.drdegnan.com 10 2026-05-01 2026-08-27
careers.drdegnan.com 2 2026-09-07 2026-09-07
*.careers.drdegnan.com 2 2026-09-07 2026-09-07
mta-sts.drdegnan.com 9 2026-04-19 2026-08-15
news.drdegnan.com 17 2026-05-29 2026-10-02
anti-burnout.drdegnan.com 8 2026-04-22 2026-08-19
antiburnout.drdegnan.com 6 2026-04-21 2026-08-17
www.drdegnan.com 5 2026-05-01 2026-08-24
my.drdegnan.com 10 2026-05-04 2026-08-30
quiz.drdegnan.com 15 2026-05-14 2026-10-04

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