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.

20 hosts · 352 ms

HostCertsFirst seenLast seenDNS
sureapp.com 18 2025-07-03 2026-09-22 ok
*.sureapp.com 9 2025-07-03 2026-09-02 —
sw-prod.sureapp.com 3 2026-05-11 2026-05-28 ok
heyhowie.sureapp.com 3 2026-07-28 2026-09-28 ok
disclosure.sureapp.com 1 2026-09-10 2026-09-10 ok
api.sureapp.com 5 2026-04-27 2026-08-25 ok
dev-nac-api.sureapp.com 2 2026-04-11 2026-09-11 ok
*.dev-nac-api.sureapp.com 2 2026-04-11 2026-09-11 —
email.sureapp.com 14 2026-05-12 2026-09-07 ok
info.sureapp.com 20 2026-05-12 2026-09-07 ok
registry.packages.sureapp.com 4 2026-07-27 2026-09-25 ok
developers.sureapp.com 5 2026-05-11 2026-09-11 ok
test-ws.sureapp.com 1 2026-02-09 2026-02-09 ok
support.sureapp.com 10 2026-04-27 2026-08-23 ok
zillowsupport.sureapp.com 15 2026-06-06 2026-10-02 ok
sw-test.sureapp.com 2 2026-01-08 2026-02-13 nodata
trust.sureapp.com 4 2026-04-10 2026-04-11 ok
www.sureapp.com 8 2026-05-02 2026-09-19 ok
launchsurely.sureapp.com 2 2025-08-17 2026-07-18 nodata
*.launchsurely.sureapp.com 7 2025-08-17 2026-09-30 —

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