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.

10 hosts · 274 ms

HostCertsFirst seenLast seenDNS
itc-hotels.com 2 2026-02-13 2026-04-10 ok
jaiwra.itc-hotels.com 1 2026-02-13 2026-02-13 ok
msrprd.itc-hotels.com 3 2026-04-28 2026-04-29 ok
www.msrprd.itc-hotels.com 3 2026-04-28 2026-04-29 nxdomain
maafch.itc-hotels.com 1 2026-02-13 2026-02-13 ok
siebel.itc-hotels.com 1 2026-02-13 2026-02-13 ok
chm.itc-hotels.com 1 2026-02-13 2026-02-13 ok
hydiko.itc-hotels.com 1 2026-02-13 2026-02-13 ok
ows.itc-hotels.com 1 2026-02-13 2026-02-13 ok
www.itc-hotels.com 1 2026-02-13 2026-02-13 ok

Programmatic access, with DNS A records: API GET /v1/hosts/itc-hotels.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/itc-hotels.com.