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 · 333 ms

HostCertsFirst seenLast seenDNS
alldatadev.net 1 2026-07-17 2026-07-17 nodata
mta-sts.alldatadev.net 1 2026-08-27 2026-08-27 ok
msgconfigsit.alldatadev.net 1 2025-10-28 2025-10-28 nxdomain
www.msgconfigsit.alldatadev.net 1 2025-10-28 2025-10-28 nxdomain
msgconfigdev.alldatadev.net 1 2025-10-28 2025-10-28 nxdomain
www.msgconfigdev.alldatadev.net 1 2025-10-28 2025-10-28 nxdomain
colparmdev.alldatadev.net 2 2025-10-23 2026-09-29 nxdomain
sdsparmdev.alldatadev.net 2 2025-10-23 2026-09-29 nxdomain
corpdev.alldatadev.net 2 2026-09-28 2026-09-28 nodata
brd25w001.corpdev.alldatadev.net 2 2026-04-29 2026-04-29 nxdomain
brd25w002.corpdev.alldatadev.net 2 2026-04-29 2026-04-29 nxdomain
brd25w003.corpdev.alldatadev.net 2 2026-07-06 2026-07-07 nxdomain
brd29w054.corpdev.alldatadev.net 1 2026-09-11 2026-09-11 nxdomain
wfhb1-int-car.corpdev.alldatadev.net 2 2026-09-30 2026-09-30 nxdomain
www.wfhb1-int-car.corpdev.alldatadev.net 1 2026-09-30 2026-09-30 nxdomain
wfhb2-int-car.corpdev.alldatadev.net 1 2026-09-30 2026-09-30 nxdomain
caasdev.corpdev.alldatadev.net 1 2025-10-27 2025-10-27 ok
www.caasdev.corpdev.alldatadev.net 1 2025-10-27 2025-10-27 nxdomain
www.corpdev.alldatadev.net 2 2026-09-28 2026-09-28 nxdomain

Programmatic access, with DNS A records: API GET /v1/hosts/alldatadev.net (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/alldatadev.net.