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.

39 hosts · 338 ms

HostCertsFirst seenLast seenDNS
tryhamster.com 35 2026-04-14 2026-09-19 ok
*.tryhamster.com 23 2026-04-14 2026-09-19 —
id.tryhamster.com 9 2026-05-21 2026-09-16 ok
build.tryhamster.com 5 2026-05-27 2026-08-29 ok
brand.tryhamster.com 3 2026-06-22 2026-08-24 ok
billing.tryhamster.com 10 2026-05-31 2026-09-26 ok
production.tryhamster.com 10 2026-04-17 2026-08-13 ok
go.tryhamster.com 1 2025-06-26 2025-06-26 nodata
p.tryhamster.com 6 2026-04-20 2026-08-16 ok
pm-bounces.tryhamster.com 4 2026-07-31 2026-07-31 ok
emails.tryhamster.com 7 2026-04-28 2026-09-17 ok
ops.tryhamster.com 9 2026-04-26 2026-08-22 ok
t.tryhamster.com 7 2026-06-04 2026-10-01 ok
git.tryhamster.com 4 2026-08-06 2026-10-01 ok
test.tryhamster.com 8 2026-04-30 2026-08-26 ok
*.test.tryhamster.com 9 2026-04-30 2026-08-26 —
go.test.tryhamster.com 1 2025-06-26 2025-06-26 nodata
trust.tryhamster.com 9 2026-06-04 2026-10-01 ok
dev.tryhamster.com 12 2026-05-01 2026-08-28 ok
studio-dev.tryhamster.com 12 2026-06-03 2026-09-30 ok
services-dev.tryhamster.com 9 2026-06-04 2026-09-30 ok
*.dev.tryhamster.com 9 2026-04-30 2026-08-26 —
id.dev.tryhamster.com 12 2026-05-21 2026-09-16 ok
go.dev.tryhamster.com 3 2025-06-26 2026-05-27 nodata
sync-gw.tryhamster.com 5 2026-04-26 2026-08-15 ok
tux-sync-gw.tryhamster.com 4 2026-04-28 2026-08-12 ok
api-gw.tryhamster.com 5 2026-04-26 2026-08-15 ok
tux-api-gw.tryhamster.com 4 2026-04-28 2026-08-12 ok
studio-gw.tryhamster.com 5 2026-04-26 2026-08-15 ok
tux-studio-gw.tryhamster.com 4 2026-04-28 2026-08-12 ok
mcp-gw.tryhamster.com 5 2026-04-26 2026-08-15 ok
tux-mcp-gw.tryhamster.com 4 2026-04-28 2026-08-12 ok
context-gw.tryhamster.com 3 2026-06-02 2026-06-02 nxdomain
backend-context-gw.tryhamster.com 3 2026-06-02 2026-06-02 nxdomain
tux-backend-context-gw.tryhamster.com 1 2026-06-02 2026-06-02 nxdomain
tux-context-gw.tryhamster.com 1 2026-06-02 2026-06-02 nxdomain
www.tryhamster.com 6 2026-04-18 2026-08-14 ok
tux.tryhamster.com 12 2026-04-17 2026-08-14 ok
id.tux.tryhamster.com 10 2026-05-21 2026-09-16 ok

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