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.

11 hosts · 282 ms

HostCertsFirst seenLast seen
swagapp.com 7 2025-12-09 2026-10-08
*.swagapp.com 9 2025-08-12 2026-10-08
staging.swagapp.com 3 2026-01-22 2026-09-16
*.staging.swagapp.com 8 2026-01-22 2026-10-12
smartmatch.swagapp.com 2 2025-07-22 2026-06-22
*.smartmatch.swagapp.com 2 2025-08-11 2026-07-12
l.mail.swagapp.com 2 2025-06-23 2026-05-24
l.info.swagapp.com 2 2025-06-23 2026-05-24
help.swagapp.com 1 2025-12-09 2025-12-09
jobs.swagapp.com 1 2025-12-09 2025-12-09
www.jobs.swagapp.com 1 2025-11-25 2025-11-25

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