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.

15 hosts · 288 ms

HostCertsFirst seenLast seenDNS
aiuniv.edu 26 2025-09-19 2026-10-05 ok
*.aiuniv.edu 26 2025-09-19 2026-10-05 —
*.atlanta.aiuniv.edu 21 2026-04-12 2026-10-05 —
int-discussionboard.aiuniv.edu 13 2026-07-15 2026-09-30 nxdomain
*.houston.aiuniv.edu 21 2026-04-12 2026-10-05 —
autodiscover.houston.aiuniv.edu 2 2025-12-26 2026-01-25 nodata
reg-ltiidp.aiuniv.edu 14 2026-07-31 2026-10-02 nxdomain
int-ltiidp.aiuniv.edu 15 2026-07-15 2026-09-30 ok
smartcatalogiq.aiuniv.edu 2 2025-09-30 2026-08-31 ok
autodiscover.aiuniv.edu 2 2025-12-26 2026-01-25 ok
class.aiuniv.edu 17 2026-05-13 2026-09-30 ok
digitalcrafts.aiuniv.edu 1 2026-10-05 2026-10-05 nxdomain
int-digitalcrafts.aiuniv.edu 13 2026-07-15 2026-09-30 nxdomain
digitalcraftsenrollment.aiuniv.edu 19 2026-05-29 2026-10-02 ok
smartcatalogiq-proxy.aiuniv.edu 2 2025-09-30 2026-08-31 ok

Programmatic access, with DNS A records: API GET /v1/hosts/aiuniv.edu (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/aiuniv.edu.