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.

12 hosts · 337 ms

HostCertsFirst seenLast seenDNS
alphasights.com 18 2026-05-18 2026-09-29 ok
*.alphasights.com 21 2025-07-27 2026-09-21 —
staging.alphasights.com 10 2026-04-20 2026-08-16 ok
link.alphasights.com 4 2026-04-12 2026-08-11 ok
onepassword.scim.alphasights.com 28 2026-05-01 2026-07-04 ok
vpn.alphasights.com 5 2025-07-17 2026-08-10 nodata
info.alphasights.com 8 2026-04-23 2026-08-19 ok
links.alphasights.com 13 2026-05-30 2026-09-26 ok
status.alphasights.com 5 2026-04-29 2026-08-26 ok
team-nexus.alphasights.com 2 2025-09-22 2026-08-23 ok
*.team-nexus.alphasights.com 2 2025-09-22 2026-08-23 —
www.alphasights.com 5 2026-06-08 2026-09-29 ok

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