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.

16 hosts · 255 ms

HostCertsFirst seenLast seen
chatbot.com 16 2026-03-26 2026-09-25
*.chatbot.com 8 2026-03-26 2026-09-25
staging.chatbot.com 11 2026-03-26 2026-09-12
*.staging.chatbot.com 11 2026-03-26 2026-09-12
sst.staging.chatbot.com 5 2026-05-21 2026-10-08
www.staging.chatbot.com 4 2026-04-14 2026-06-13
click.chatbot.com 3 2026-06-17 2026-08-25
labs.chatbot.com 6 2026-02-13 2026-08-14
*.labs.chatbot.com 6 2026-02-13 2026-08-14
sst.labs.chatbot.com 5 2026-05-21 2026-10-08
www.labs.chatbot.com 1 2026-04-14 2026-04-14
status.chatbot.com 5 2026-05-01 2026-09-02
sst.chatbot.com 5 2026-05-21 2026-10-08
preview.chatbot.com 3 2026-05-28 2026-09-12
*.preview.chatbot.com 3 2026-05-28 2026-09-12
www.chatbot.com 8 2026-04-14 2026-08-15

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