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.

12 hosts · 265 ms

HostCertsFirst seenLast seen
loyalsnap.com 10 2025-10-15 2026-10-07
*.loyalsnap.com 4 2025-10-15 2026-09-15
media.loyalsnap.com 1 2026-09-27 2026-09-27
bio.loyalsnap.com 3 2026-06-19 2026-08-27
www.bio.loyalsnap.com 3 2026-06-19 2026-08-27
demo.loyalsnap.com 2 2026-03-09 2026-07-25
*.demo.loyalsnap.com 2 2026-03-09 2026-07-25
help.loyalsnap.com 12 2026-04-19 2026-08-15
start.loyalsnap.com 10 2026-04-18 2026-08-15
*.dev.loyalsnap.com 3 2025-09-16 2026-08-17
media.dev.loyalsnap.com 1 2026-09-27 2026-09-27
www.loyalsnap.com 6 2025-12-16 2026-10-07

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