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.

11 hosts · 252 ms

HostCertsFirst seenLast seenDNS
mobile.hnbbank.com 4 2025-09-16 2026-09-30 ok
www.mobile.hnbbank.com 4 2025-09-16 2026-09-30 nxdomain
mail.hnbbank.com 5 2025-09-16 2026-09-30 ok
www.mail.hnbbank.com 1 2026-06-23 2026-06-23 nxdomain
honatbancorp.hnbbank.com 1 2026-02-06 2026-02-06 ok
www.honatbancorp.hnbbank.com 1 2026-02-06 2026-02-06 nxdomain
autodiscover.hnbbank.com 4 2025-09-16 2026-09-30 ok
dealers.hnbbank.com 1 2026-02-04 2026-02-04 ok
www.dealers.hnbbank.com 1 2026-02-04 2026-02-04 nxdomain
mta-sts.hnbbank.com 3 2026-04-17 2026-09-06 ok
legacy.hnbbank.com 4 2025-09-16 2026-09-30 ok

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