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.

21 hosts · 326 ms

HostCertsFirst seenLast seenDNS
thatch.com 23 2026-04-14 2026-09-21 ok
*.thatch.com 20 2026-04-13 2026-09-21 —
ivr-service.thatch.com 9 2026-06-05 2026-10-01 ok
metabase.thatch.com 2 2026-02-27 2026-07-30 ok
staging.thatch.com 4 2026-04-10 2026-08-14 ok
ph.thatch.com 2 2025-08-08 2026-07-09 ok
sgmt-api.thatch.com 2 2025-08-08 2026-07-09 ok
temporal.thatch.com 8 2026-03-03 2026-08-22 ok
sgmt-cdn.thatch.com 2 2025-08-08 2026-07-09 ok
admin.thatch.com 10 2026-04-15 2026-08-12 ok
go.thatch.com 16 2026-04-29 2026-08-26 ok
mp.thatch.com 1 2026-06-09 2026-06-09 ok
app.thatch.com 5 2025-11-17 2026-09-15 ok
www.app.thatch.com 2 2025-11-17 2025-11-24 nxdomain
docs.thatch.com 5 2026-05-08 2026-09-12 ok
sms.thatch.com 4 2026-04-17 2026-08-16 ok
assets.thatch.com 2 2025-08-08 2026-07-09 nodata
status.thatch.com 5 2026-05-19 2026-09-21 ok
support.thatch.com 5 2026-05-06 2026-09-09 ok
trust.thatch.com 8 2026-04-28 2026-08-24 ok
www.thatch.com 5 2026-05-05 2026-09-06 ok

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