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.

26 hosts · 357 ms

Download CSV
HostCertsFirst seenLast seen
ridge.com 35 2026-04-25 2026-09-27
*.ridge.com 26 2026-04-25 2026-09-23
ca.ridge.com 4 2026-06-16 2026-10-14
build.ridge.com 4 2026-06-04 2026-10-07
testtie.ridge.com 4 2026-06-08 2026-10-06
wholesale.ridge.com 13 2026-05-30 2026-10-10
ss3.zone.ridge.com 6 2026-04-29 2026-08-28
ss.zone.ridge.com 2 2026-04-29 2026-04-29
sg.ridge.com 15 2026-06-04 2026-10-10
i.ridge.com 4 2026-06-11 2026-09-29
atabk.ridge.com 4 2026-06-16 2026-10-14
hk.ridge.com 15 2026-04-19 2026-10-15
ask.ridge.com 3 2026-06-14 2026-09-11
uk.ridge.com 4 2026-06-16 2026-10-14
cn.ridge.com 16 2026-04-21 2026-10-14
replo.ridge.com 7 2026-08-06 2026-10-05
jp.ridge.com 17 2026-06-05 2026-10-13
kr.ridge.com 11 2026-06-04 2026-10-14
email.entries.ridge.com 4 2026-06-02 2026-08-01
partners.ridge.com 1 2026-01-19 2026-01-19
ss.ridge.com 4 2026-04-27 2026-06-26
au.ridge.com 4 2026-06-16 2026-10-14
eu.ridge.com 14 2026-05-20 2026-09-30
tw.ridge.com 14 2026-05-28 2026-10-07
www.ridge.com 7 2026-05-16 2026-09-24
www.try.ridge.com 10 2026-05-08 2026-09-03

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