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.

9 hosts · 332 ms

HostCertsFirst seenLast seenDNS
techtreewireless.com 10 2026-05-16 2026-10-02 ok
wholesale.techtreewireless.com 1 2026-09-07 2026-09-07 ok
api.techtreewireless.com 9 2026-06-09 2026-10-05 ok
ecom.techtreewireless.com 1 2026-09-14 2026-09-14 ok
admin.techtreewireless.com 1 2026-09-14 2026-09-14 ok
www.techtreewireless.com 9 2026-05-16 2026-10-04 ok
pay.techtreewireless.com 3 2025-07-06 2026-07-05 nxdomain
www.pay.techtreewireless.com 3 2025-07-06 2026-07-05 nxdomain
buy.techtreewireless.com 5 2026-05-31 2026-08-12 ok

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