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.

13 hosts · 272 ms

HostCertsFirst seenLast seen
spotpet.com 20 2026-01-24 2026-10-01
*.spotpet.com 21 2025-11-05 2026-10-06
eb.spotpet.com 5 2026-05-28 2026-09-25
love.spotpet.com 11 2026-05-19 2026-09-14
hub-staging.spotpet.com 2 2026-09-20 2026-09-20
*.hub-staging.spotpet.com 2 2026-09-20 2026-09-20
request-staging.spotpet.com 2 2026-09-20 2026-09-20
*.request-staging.spotpet.com 2 2026-09-20 2026-09-20
link.spotpet.com 5 2026-05-13 2026-09-28
to.spotpet.com 5 2026-04-22 2026-08-18
customer.spotpet.com 4 2026-05-19 2026-05-26
*.customer.spotpet.com 2 2026-05-26 2026-05-26
get.spotpet.com 8 2026-05-03 2026-08-30

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