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.

51 hosts · 343 ms

HostCertsFirst seenLast seenDNS
actingoffice.com 6 2026-04-12 2026-09-26 ok
*.actingoffice.com 8 2026-05-01 2026-10-05 —
docs1.actingoffice.com 2 2026-02-14 2026-07-07 ok
static.actingoffice.com 2 2026-03-03 2026-07-16 ok
storage.actingoffice.com 2 2026-03-03 2026-07-16 ok
apilive.actingoffice.com 2 2026-03-03 2026-07-15 ok
applive.actingoffice.com 2 2026-03-02 2026-07-14 ok
api.actingoffice.com 2 2026-03-03 2026-07-16 ok
cdn.actingoffice.com 1 2026-07-29 2026-07-29 ok
admin.actingoffice.com 2 2026-03-05 2026-07-17 ok
mcp.actingoffice.com 1 2026-09-05 2026-09-05 ok
apidevtemp.actingoffice.com 2 2026-02-24 2026-06-17 ok
appdevtemp.actingoffice.com 2 2026-02-13 2026-07-06 ok
app.actingoffice.com 5 2026-05-01 2026-08-31 nodata
docs.actingoffice.com 4 2026-04-11 2026-08-12 ok
*.services.actingoffice.com 1 2026-08-11 2026-08-11 —
ai.services.actingoffice.com 4 2026-03-03 2026-07-16 ok
payroll.services.actingoffice.com 1 2026-08-04 2026-08-04 ok
emails.services.actingoffice.com 2 2026-03-05 2026-07-17 ok
audit.services.actingoffice.com 2 2026-03-04 2026-07-16 ok
pages.actingoffice.com 2 2026-09-03 2026-09-03 ok
hooks.actingoffice.com 2 2026-03-03 2026-07-16 ok
webhooks.actingoffice.com 2 2026-03-03 2026-07-16 ok
widgets.actingoffice.com 3 2026-03-03 2026-07-16 ok
components.actingoffice.com 4 2026-02-09 2026-09-14 ok
accounts.actingoffice.com 2 2026-03-03 2026-07-16 ok
apidevus.actingoffice.com 1 2026-09-01 2026-09-01 —
appdevus.actingoffice.com 2 2026-08-31 2026-08-31 —
news.actingoffice.com 5 2026-05-19 2026-09-07 ok
uat.actingoffice.com 5 2026-05-14 2026-09-02 ok
widgets-uat.actingoffice.com 2 2026-03-02 2026-07-19 ok
apiuat.actingoffice.com 4 2026-02-21 2026-10-02 ok
cdnuat.actingoffice.com 1 2026-07-29 2026-07-29 ok
adminuat.actingoffice.com 3 2026-02-20 2026-10-04 ok
mcpuat.actingoffice.com 1 2026-09-03 2026-09-03 ok
appuat.actingoffice.com 3 2026-02-20 2026-10-04 ok
docsuat.actingoffice.com 2 2026-04-27 2026-08-12 ok
ai.servicesuat.actingoffice.com 5 2026-05-27 2026-09-25 ok
payroll.servicesuat.actingoffice.com 1 2026-08-04 2026-08-04 ok
emails.servicesuat.actingoffice.com 2 2026-02-22 2026-06-14 ok
audit.servicesuat.actingoffice.com 2 2026-02-25 2026-06-17 ok
hooksuat.actingoffice.com 2 2026-02-23 2026-06-16 ok
accountsuat.actingoffice.com 2 2026-03-05 2026-07-17 ok
supportuat.actingoffice.com 2 2026-02-24 2026-06-16 ok
test-ascendant.actingoffice.com 2 2026-02-25 2026-06-17 ok
support.actingoffice.com 2 2026-03-04 2026-07-17 ok
apidev.actingoffice.com 2 2026-02-24 2026-06-17 ok
appdev.actingoffice.com 2 2026-02-16 2026-07-08 ok
hooksdev.actingoffice.com 2 2026-02-24 2026-06-17 ok
accountsdev.actingoffice.com 2 2026-02-24 2026-06-17 ok
www.actingoffice.com 6 2026-04-12 2026-09-26 ok

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