Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

9 hosts · 305 ms

HostCertsFirst seenLast seenDNS
gotocompany.com 1 2026-01-12 2026-01-12 ok
*.gotocompany.com 1 2026-01-12 2026-01-12 —
techoffice.gotocompany.com 5 2026-05-01 2026-08-30 ok
manfee.gotocompany.com 3 2025-09-01 2026-08-26 ok
www.manfee.gotocompany.com 3 2025-09-01 2026-08-26 nxdomain
onegoto.gotocompany.com 1 2026-07-08 2026-07-08 ok
www.onegoto.gotocompany.com 1 2026-07-08 2026-07-08 nxdomain
api.sap.gotocompany.com 1 2026-01-06 2026-01-06 ok
www.api.sap.gotocompany.com 1 2026-01-06 2026-01-06 nxdomain

Programmatic access, with DNS A records: API GET /v1/hosts/gotocompany.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/gotocompany.com.