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.

19 hosts · 277 ms

HostCertsFirst seenLast seenDNS
connectedyou.io 2 2025-08-19 2026-07-20 ok
*.connectedyou.io 3 2025-08-19 2026-07-20 —
uberone.connectedyou.io 15 2026-04-15 2026-08-25 ok
*.warehouse.connectedyou.io 3 2026-03-31 2026-08-31 —
redash.connectedyou.io 5 2026-05-24 2026-09-22 ok
docs.api.connectedyou.io 4 2026-04-19 2026-08-18 ok
esim.connectedyou.io 18 2026-05-26 2026-10-04 ok
staging.esim.connectedyou.io 24 2026-04-14 2026-09-26 ok
reseller.esim.connectedyou.io 1 2026-02-17 2026-02-17 ok
*.reseller.esim.connectedyou.io 1 2026-02-17 2026-02-17 —
docs.api.reseller.esim.connectedyou.io 5 2026-05-29 2026-09-27 ok
affiliates.esim.connectedyou.io 5 2026-05-17 2026-09-14 ok
sm.connectedyou.io 5 2026-05-04 2026-09-02 ok
shop.connectedyou.io 16 2026-05-17 2026-09-29 ok
uber.connectedyou.io 13 2026-04-15 2026-08-24 ok
esim-docs.reseller.connectedyou.io 9 2026-04-26 2026-08-22 ok
docs.connectedyou.io 6 2026-06-03 2026-09-29 ok
content.connectedyou.io 2 2025-08-02 2026-07-02 ok
iot.connectedyou.io 14 2026-05-25 2026-10-05 ok

Programmatic access, with DNS A records: API GET /v1/hosts/connectedyou.io (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/connectedyou.io.