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.

16 hosts · 336 ms

HostCertsFirst seenLast seenDNS
omnihotels.com 18 2026-01-28 2026-09-20 ok
*.omnihotels.com 18 2026-01-28 2026-09-20 —
america250.omnihotels.com 8 2026-04-14 2026-08-11 ok
u762.omnihotels.com 1 2025-12-28 2025-12-28 ok
j508.omnihotels.com 1 2025-12-28 2025-12-28 ok
scimbridge.omnihotels.com 4 2026-04-13 2026-08-10 ok
mobile.omnihotels.com 12 2026-01-06 2026-09-26 ok
blog.omnihotels.com 1 2026-10-05 2026-10-05 ok
cloud.em.omnihotels.com 1 2025-11-05 2025-11-05 servfail
image.em.omnihotels.com 3 2026-01-22 2026-09-07 ok
click.em.omnihotels.com 1 2025-11-04 2025-11-04 ok
view.em.omnihotels.com 1 2025-11-05 2025-11-05 ok
qr.omnihotels.com 1 2026-02-10 2026-02-10 ok
escapes.omnihotels.com 3 2026-06-09 2026-08-23 ok
bookings.omnihotels.com 1 2025-12-18 2025-12-18 ok
mta-sts.omnihotels.com 5 2026-04-29 2026-08-27 ok

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