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.

17 hosts · 243 ms

HostCertsFirst seenLast seenDNS
tridenthotels.com 3 2025-10-31 2026-01-03 ok
*.tridenthotels.com 2 2025-10-31 2025-12-09 —
aws-cm.tridenthotels.com 1 2026-01-03 2026-01-03 ok
cloud.tp.tridenthotels.com 2 2026-09-30 2026-09-30 ok
image.tp.tridenthotels.com 12 2026-09-30 2026-10-02 ok
click.tp.tridenthotels.com 1 2026-10-03 2026-10-03 ok
view.tp.tridenthotels.com 1 2026-09-30 2026-09-30 ok
res.tridenthotels.com 2 2026-01-03 2026-02-24 ok
www.res.tridenthotels.com 1 2026-02-24 2026-02-24 nxdomain
cloud.mails.tridenthotels.com 1 2025-12-14 2025-12-14 ok
image.mails.tridenthotels.com 3 2025-10-17 2026-09-07 ok
click.mails.tridenthotels.com 1 2025-12-14 2025-12-14 ok
view.mails.tridenthotels.com 1 2025-12-14 2025-12-14 ok
apps.tridenthotels.com 1 2026-01-03 2026-01-03 ok
aws.tridenthotels.com 1 2026-01-03 2026-01-03 ok
www.tridenthotels.com 1 2026-01-03 2026-01-03 ok
onlinedelivery.tridenthotels.com 1 2026-01-03 2026-01-03 ok

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