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.

30 hosts · 322 ms

HostCertsFirst seenLast seenDNS
whisker.com 9 2025-08-28 2026-09-25 ok
*.whisker.com 9 2025-08-28 2026-09-25 —
cdi2.whisker.com 3 2025-12-05 2026-01-19 nodata
col.cdi2.whisker.com 4 2025-12-05 2026-06-24 ok
ts.cdi2.whisker.com 4 2025-12-05 2026-06-24 ok
vpn2.whisker.com 1 2025-08-21 2025-08-21 nxdomain
www.vpn2.whisker.com 1 2025-08-21 2025-08-21 nxdomain
na.a.whisker.com 5 2026-05-11 2026-09-08 ok
eu.a.whisker.com 5 2026-05-11 2026-09-08 ok
stage.whisker.com 13 2026-05-28 2026-09-25 ok
materialhandler-stage.whisker.com 2 2026-05-06 2026-07-02 ok
ops-stage.whisker.com 3 2026-05-16 2026-09-29 ok
cal-lite.whisker.com 2 2026-02-13 2026-07-07 ok
wiki.whisker.com 6 2026-04-25 2026-10-02 ok
ops-wiki.whisker.com 2 2026-03-02 2026-06-29 ok
ops-api.whisker.com 3 2026-02-24 2026-08-06 ok
help.whisker.com 5 2026-05-06 2026-09-03 ok
sps-interop.whisker.com 4 2026-04-23 2026-07-22 ok
materialhandler.whisker.com 1 2026-09-02 2026-09-02 ok
cluster.whisker.com 7 2026-06-12 2026-09-20 ok
lazer.whisker.com 13 2026-05-03 2026-09-19 ok
lens.whisker.com 1 2026-06-29 2026-06-29 ok
ops.whisker.com 3 2026-05-15 2026-09-30 ok
status.whisker.com 2 2025-11-14 2025-11-14 ok
dev.whisker.com 8 2026-04-20 2026-08-18 ok
shipping-dev.whisker.com 9 2026-06-16 2026-09-24 ok
sps-interop-dev.whisker.com 3 2026-04-23 2026-08-31 ok
cxautoresponder-dev.whisker.com 1 2026-06-16 2026-06-16 ok
ops-dev.whisker.com 4 2026-02-20 2026-10-04 ok
pwadev.whisker.com 8 2026-06-24 2026-10-02 ok

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