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.

22 hosts · 375 ms

HostCertsFirst seenLast seenDNS
repco.co.nz 13 2025-12-17 2026-09-08 ok
*.repco.co.nz 2 2026-02-22 2026-07-10 —
dev2.repco.co.nz 1 2026-09-22 2026-09-22 nxdomain
api.dev2.repco.co.nz 1 2026-09-22 2026-09-22 nxdomain
uat3.repco.co.nz 12 2026-04-18 2026-08-15 ok
garage.repco.co.nz 23 2026-04-13 2026-09-23 ok
*.garage.repco.co.nz 1 2026-04-22 2026-04-22 —
stage.repco.co.nz 13 2025-10-30 2026-08-25 ok
api.stage.repco.co.nz 3 2025-10-30 2026-09-23 ok
api.repco.co.nz 3 2026-09-08 2026-09-23 nxdomain
m.repco.co.nz 8 2026-05-21 2026-09-17 ok
info.repco.co.nz 12 2026-05-06 2026-09-02 servfail
go.repco.co.nz 8 2026-05-07 2026-09-03 ok
temp.repco.co.nz 13 2025-12-17 2026-08-23 ok
smetrics.repco.co.nz 2 2026-02-21 2026-02-21 ok
m.careers.repco.co.nz 6 2026-04-16 2026-09-15 ok
uat.repco.co.nz 10 2026-04-17 2026-08-13 ok
dev.repco.co.nz 9 2025-10-30 2026-08-25 ok
api.dev.repco.co.nz 3 2025-10-30 2026-09-23 ok
login.dev.repco.co.nz 3 2026-09-03 2026-09-08 ok
app.dev.repco.co.nz 3 2026-09-03 2026-09-08 ok
www.repco.co.nz 15 2025-12-17 2026-09-08 ok

Programmatic access, with DNS A records: API GET /v1/hosts/repco.co.nz (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/repco.co.nz.