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.

29 hosts · 369 ms

HostCertsFirst seenLast seenDNS
hsn.net 8 2025-07-07 2026-05-04 nodata
hsdlfma001.hsn.net 1 2026-04-30 2026-04-30 nxdomain
hiplora001.hsn.net 1 2026-04-29 2026-04-29 nxdomain
STPISE01.hsn.net 1 2025-10-09 2025-10-09 —
lebise01.hsn.net 1 2025-10-09 2025-10-09 nxdomain
spdlfm01.hsn.net 1 2026-04-30 2026-04-30 nxdomain
hsdlfma002.hsn.net 1 2026-04-30 2026-04-30 nxdomain
HSNOMSAPP.hsn.net 1 2026-04-29 2026-04-29 —
viewqa.hsn.net 1 2026-01-12 2026-01-12 nxdomain
hidwigw002.stpete.hsn.net 1 2026-03-25 2026-03-25 nxdomain
enterpriseregistration.stpete.hsn.net 2 2026-04-17 2026-10-05 nxdomain
devmail.devstpete.hsn.net 2 2025-07-16 2026-04-28 nxdomain
edgeh.hsn.net 1 2025-10-15 2025-10-15 ok
hsnedi.hsn.net 1 2026-04-29 2026-04-29 ok
hsntestedi.hsn.net 1 2026-04-29 2026-04-29 ok
hsnmail.hsn.net 1 2026-05-11 2026-05-11 ok
lpfm.hsn.net 1 2026-05-13 2026-05-13 ok
rsasetup.hsn.net 2 2025-07-16 2026-04-29 ok
autodiscover.hsn.net 1 2026-05-11 2026-05-11 ok
cloud.vendor.hsn.net 1 2026-02-17 2026-02-17 ok
image.vendor.hsn.net 2 2026-01-08 2026-02-09 ok
click.vendor.hsn.net 1 2026-02-17 2026-02-17 ok
view.vendor.hsn.net 1 2026-02-17 2026-02-17 ok
adfs.hsn.net 2 2026-04-17 2026-10-05 ok
tfs.hsn.net 2 2025-07-14 2026-05-05 nxdomain
viewuat.hsn.net 1 2026-01-12 2026-01-12 nxdomain
lpfm-dev.hsn.net 1 2026-04-30 2026-04-30 ok
viewdev.hsn.net 1 2026-01-12 2026-01-12 nxdomain
view.hsn.net 3 2026-03-10 2026-09-08 ok

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