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.

7 hosts · 276 ms

HostCertsFirst seenLast seenDNS
abacusgm.com 8 2026-05-24 2026-09-09 ok
*.abacusgm.com 6 2026-05-24 2026-09-05 —
track.sl.abacusgm.com 8 2026-05-12 2026-09-09 ok
go.abacusgm.com 9 2026-04-20 2026-09-17 ok
ir.abacusgm.com 4 2026-04-20 2026-08-18 ok
chat.abacusgm.com 6 2026-06-03 2026-10-01 ok
www.abacusgm.com 2 2026-09-09 2026-09-09 ok

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