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.

42 hosts · 217 ms

HostCertsFirst seenLast seen
philo.com 2 2026-02-08 2026-02-10
*.philo.com 1 2026-02-10 2026-02-10
gitlab.philo.com 3 2026-06-03 2026-09-01
pages.gitlab.philo.com 4 2025-06-30 2026-09-01
*.pages.gitlab.philo.com 4 2025-06-30 2026-09-01
oidc.philo.com 1 2026-06-05 2026-06-05
noc.philo.com 8 2026-05-03 2026-07-02
idp-staging-md.philo.com 2 2025-09-03 2026-08-03
idp-md.philo.com 2 2025-09-03 2026-08-03
internal-storage.philo.com 2 2025-08-28 2026-07-29
outage.philo.com 1 2026-02-08 2026-02-08
*.cdn-cf.philo.com 2 2025-07-22 2026-06-21
prod-g.cdn-cf.philo.com 3 2025-10-30 2026-09-30
prod-s.cdn-cf.philo.com 3 2025-10-10 2026-09-28
kenny-s.cdn-cf.philo.com 3 2025-10-10 2026-09-28
testblog.philo.com 3 2026-04-25 2026-08-27
www.testblog.philo.com 3 2026-04-25 2026-08-27
link.team.philo.com 1 2026-01-21 2026-01-21
learn.philo.com 7 2026-05-15 2026-09-29
link.hello.philo.com 1 2026-01-21 2026-01-21
apple-sso.philo.com 2 2025-06-16 2026-07-09
www.apple-sso.philo.com 2 2025-06-16 2026-07-09
help.philo.com 1 2025-12-08 2025-12-08
api.analytics.philo.com 2 2025-09-26 2026-08-27
evs.analytics.philo.com 2 2025-09-26 2026-08-27
status.philo.com 5 2026-05-21 2026-09-21
link.account.philo.com 1 2026-01-21 2026-01-21
about.philo.com 1 2025-12-08 2025-12-08
tv.philo.com 1 2026-02-08 2026-02-08
*.tv.philo.com 2 2025-11-02 2026-10-03
static-us-east-2-a-fastly.tv.philo.com 4 2025-10-10 2026-09-28
content-us-east-2-staging-fastly.tv.philo.com 1 2025-12-08 2025-12-08
www.philo.com 1 2026-02-08 2026-02-08
static-us-east-2-fastly-a.www.philo.com 6 2025-10-09 2026-09-28
content-us-east-2-fastly-b.www.philo.com 4 2025-10-30 2026-09-30
static-us-east-2-staging-fastly.www.philo.com 1 2025-12-08 2025-12-08
content-us-east-2-staging-fastly.www.philo.com 1 2025-12-08 2025-12-08
static-us-east-2-kenny-fastly.www.philo.com 4 2025-10-10 2026-09-28
prod.drm-fsty.philo.com 1 2026-02-11 2026-02-11
prod.cdn-fsty.philo.com 4 2025-10-30 2026-09-30
staging.cdn-fsty.philo.com 1 2025-12-08 2025-12-08
prod.geo-fsty.philo.com 5 2026-05-13 2026-09-10

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