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.

32 hosts · 286 ms

HostCertsFirst seenLast seen
assemblyai.com 8 2026-05-28 2026-10-01
*.assemblyai.com 28 2025-11-25 2026-09-15
*.euc1.assemblyai.com 7 2026-07-08 2026-08-12
*.use1.assemblyai.com 4 2025-12-23 2026-08-12
api.use1.assemblyai.com 1 2026-09-29 2026-09-29
*.eun1.assemblyai.com 7 2026-02-27 2026-08-12
*.euw1.assemblyai.com 2 2025-12-29 2025-12-29
*.use2.assemblyai.com 5 2026-07-08 2026-08-12
*.usw2.assemblyai.com 4 2025-12-29 2026-08-12
*.edge.assemblyai.com 23 2025-12-23 2026-08-12
snake.assemblyai.com 6 2026-05-09 2026-09-04
auth.assemblyai.com 8 2026-04-20 2026-08-17
mini.assemblyai.com 6 2026-05-05 2026-09-01
*.api.assemblyai.com 4 2025-11-25 2026-09-15
fern.assemblyai.com 5 2026-05-07 2026-09-10
studio.assemblyai.com 4 2026-04-21 2026-08-23
roadmap.assemblyai.com 5 2026-05-12 2026-09-14
mcp.assemblyai.com 5 2026-05-30 2026-09-30
*.app.assemblyai.com 4 2025-11-25 2026-09-15
*.notetaker.assemblyai.com 10 2026-08-12 2026-08-12
prompt-wizard.tools.assemblyai.com 15 2026-04-12 2026-10-06
compare.tools.assemblyai.com 10 2026-04-18 2026-08-14
*.agents.assemblyai.com 10 2026-08-12 2026-08-12
mta-sts.assemblyai.com 5 2026-05-13 2026-09-11
*.us.assemblyai.com 13 2025-12-23 2026-08-12
status.assemblyai.com 5 2026-05-06 2026-09-02
chat.assemblyai.com 7 2026-04-17 2026-08-17
support.assemblyai.com 3 2025-10-15 2026-09-15
*.eu.assemblyai.com 19 2025-10-14 2026-09-14
webflow.assemblyai.com 10 2026-04-22 2026-08-18
www.assemblyai.com 5 2026-05-30 2026-10-01
telemetry.assemblyai.com 5 2026-04-29 2026-08-28

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