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.

5 hosts · 280 ms

HostCertsFirst seenLast seen
m-bamerica.com 8 2026-05-09 2026-09-24
*.m-bamerica.com 8 2026-05-09 2026-09-24
AutoDiscover.m-bamerica.com 1 2025-10-06 2025-10-06
mta-sts.m-bamerica.com 3 2025-10-06 2026-09-06
smart.m-bamerica.com 5 2026-05-29 2026-09-26

Programmatic access: API GET /v1/hosts/m-bamerica.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/m-bamerica.com.