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.

37 hosts · 197 ms

HostCertsFirst seenLast seen
tep.com 18 2025-09-09 2026-10-09
*.tep.com 16 2026-04-15 2026-10-09
beta.tep.com 18 2026-05-03 2026-08-29
track.e.tep.com 5 2026-05-25 2026-09-22
marketplace.tep.com 16 2026-05-08 2026-09-03
track.outage.tep.com 5 2026-05-25 2026-09-22
mobile.tep.com 1 2026-05-19 2026-05-19
qa2.mobile.tep.com 1 2026-05-19 2026-05-19
test2.mobile.tep.com 1 2026-05-19 2026-05-19
dev2.mobile.tep.com 1 2026-05-19 2026-05-19
qa.mobile.tep.com 1 2026-05-19 2026-05-19
test.mobile.tep.com 1 2026-05-19 2026-05-19
dev.mobile.tep.com 1 2026-05-19 2026-05-19
track.online.tep.com 5 2026-05-25 2026-09-22
gogreen.tep.com 1 2026-04-20 2026-04-20
track.customer.tep.com 5 2026-05-25 2026-09-22
esr.tep.com 21 2026-05-02 2026-08-29
docs.tep.com 12 2026-05-05 2026-08-31
standards.tep.com 13 2026-05-05 2026-08-31
track.comms.tep.com 5 2026-05-25 2026-09-22
apps.tep.com 2 2025-09-23 2026-10-01
qa2.apps.tep.com 2 2025-09-09 2026-10-01
test2.apps.tep.com 2 2025-09-09 2026-10-01
dev2.apps.tep.com 2 2025-09-09 2026-10-01
qa.apps.tep.com 2 2025-09-09 2026-10-01
nonprod.apps.tep.com 2 2025-09-09 2026-10-01
test.apps.tep.com 2 2025-09-09 2026-10-01
dev.apps.tep.com 2 2025-09-09 2026-10-01
account.tep.com 2 2025-09-23 2026-10-01
qa2.account.tep.com 2 2025-09-09 2026-10-01
test2.account.tep.com 2 2025-09-09 2026-10-01
dev2.account.tep.com 2 2025-09-09 2026-10-01
qa.account.tep.com 2 2025-09-09 2026-10-01
nonprod.account.tep.com 2 2025-09-09 2026-10-01
test.account.tep.com 2 2025-09-09 2026-10-01
dev.account.tep.com 2 2025-09-09 2026-10-01
www.tep.com 13 2025-09-09 2026-09-29

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