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 · 336 ms

HostCertsFirst seenLast seenDNS
taxhawk.com 42 2026-01-08 2026-09-28 ok
*.taxhawk.com 28 2026-01-08 2026-09-20 —
send1.taxhawk.com 5 2026-05-06 2026-09-14 ok
tokenize.taxhawk.com 1 2026-05-05 2026-05-05 ok
sandboxtokenize.taxhawk.com 1 2026-05-05 2026-05-05 ok
config.taxhawk.com 4 2026-07-21 2026-09-19 ok
*.config.taxhawk.com 4 2026-07-21 2026-09-19 —
testconfig.taxhawk.com 6 2026-07-31 2026-09-28 ok
*.testconfig.taxhawk.com 6 2026-07-31 2026-09-28 —
tpg.taxhawk.com 1 2026-02-12 2026-02-12 nxdomain
sbtpg.taxhawk.com 1 2026-02-12 2026-02-12 ok
assets-admin.taxhawk.com 2 2026-07-15 2026-07-15 nxdomain
*.assets-admin.taxhawk.com 2 2026-07-15 2026-07-15 —
*.pages.taxhawk.com 1 2026-06-02 2026-06-02 —
links.taxhawk.com 4 2026-04-18 2026-08-16 ok
links.support.taxhawk.com 2 2026-04-23 2026-04-23 ok
www.taxhawk.com 2 2026-01-10 2026-01-10 ok

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