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.

23 hosts · 277 ms

HostCertsFirst seenLast seen
text-em-all.com 3 2026-04-03 2026-09-03
*.text-em-all.com 4 2025-08-20 2026-07-21
tracking.stag-auth.text-em-all.com 4 2026-06-07 2026-10-03
tracking.auth.text-em-all.com 5 2026-06-07 2026-10-03
mobile-api.text-em-all.com 3 2026-07-07 2026-09-06
staging-mobile-api.text-em-all.com 3 2026-07-07 2026-09-06
*.api.text-em-all.com 1 2025-12-11 2025-12-11
m.text-em-all.com 4 2026-04-15 2026-08-13
staging-m.text-em-all.com 4 2026-04-15 2026-08-13
prod-test-desktop.text-em-all.com 6 2026-06-02 2026-10-01
app.text-em-all.com 5 2026-06-01 2026-09-30
staging-app.text-em-all.com 5 2026-06-01 2026-09-30
dev-app.text-em-all.com 5 2026-06-01 2026-09-30
docs.text-em-all.com 4 2026-04-15 2026-08-14
referrals.text-em-all.com 5 2026-04-24 2026-08-22
staging-forms.text-em-all.com 7 2026-06-01 2026-09-30
www-forms.text-em-all.com 5 2026-06-01 2026-09-30
staging-www-forms.text-em-all.com 5 2026-06-01 2026-09-30
status.text-em-all.com 2 2025-07-02 2026-06-01
support.text-em-all.com 5 2026-04-26 2026-08-23
bifrost.text-em-all.com 5 2026-05-01 2026-08-30
staging-bifrost.text-em-all.com 5 2026-06-01 2026-09-30
www.text-em-all.com 11 2026-04-03 2026-09-27

Programmatic access: API GET /v1/hosts/text-em-all.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/text-em-all.com.