Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

65 hosts · 249 ms

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HostCertsFirst seenLast seen
bastion.tech 54 2026-01-14 2026-10-09
*.bastion.tech 22 2026-05-10 2026-09-19
staging.bastion.tech 2 2025-12-10 2026-09-15
dnsfiltering-alb.staging.bastion.tech 2 2025-08-24 2026-07-25
dnsserver-alb.staging.bastion.tech 2 2025-09-14 2026-08-15
auth.staging.bastion.tech 1 2025-12-10 2025-12-10
api.staging.bastion.tech 2 2025-06-23 2026-05-24
admin-api.staging.bastion.tech 1 2026-05-20 2026-05-20
clerk.staging.bastion.tech 6 2026-05-02 2026-08-28
mdm.staging.bastion.tech 2 2026-02-22 2026-07-10
mcp.staging.bastion.tech 2 2025-10-02 2026-09-02
artifacts.staging.bastion.tech 16 2026-04-29 2026-08-25
aiproxy.staging.bastion.tech 2 2026-03-10 2026-08-10
clerk.bastion.tech 12 2026-06-07 2026-10-03
contact-mail.bastion.tech 13 2026-05-20 2026-09-15
mdm.bastion.tech 2 2026-02-23 2026-07-11
coco.bastion.tech 10 2026-05-02 2026-08-29
db.coco.bastion.tech 16 2026-05-04 2026-08-30
app.bastion.tech 2 2025-12-10 2026-09-17
dnsfiltering-alb.app.bastion.tech 2 2025-08-25 2026-07-26
dnsserver-alb.app.bastion.tech 3 2025-09-14 2026-08-15
auth.app.bastion.tech 1 2025-12-10 2025-12-10
api.app.bastion.tech 2 2025-06-24 2026-05-25
admin-api.app.bastion.tech 2 2025-06-24 2026-05-25
mdm.app.bastion.tech 1 2026-03-04 2026-03-04
mcp.app.bastion.tech 2 2025-10-02 2026-09-02
www.app.bastion.tech 18 2026-05-10 2026-10-10
aiproxy.app.bastion.tech 1 2026-03-10 2026-03-10
docs.bastion.tech 13 2026-02-12 2026-10-07
artifacts.bastion.tech 16 2026-05-27 2026-09-22
accounts.bastion.tech 11 2026-06-07 2026-10-04
mta-sts.bastion.tech 28 2026-06-01 2026-10-09
nautilus.bastion.tech 3 2025-10-27 2026-09-27
status.bastion.tech 4 2026-04-30 2026-10-07
coco-alt.bastion.tech 17 2026-05-09 2026-09-04
copilot.bastion.tech 14 2026-04-20 2026-10-14
support.bastion.tech 1 2026-02-10 2026-02-10
fleet-test.bastion.tech 1 2026-08-05 2026-08-05
trust.bastion.tech 3 2026-06-09 2026-10-07
dev.bastion.tech 5 2025-12-10 2026-09-15
coco-dev.bastion.tech 20 2026-04-27 2026-08-24
beluga.dev.bastion.tech 20 2026-04-25 2026-08-21
dnsfiltering-alb.dev.bastion.tech 2 2025-08-24 2026-07-25
dnsserver-alb.dev.bastion.tech 2 2025-09-07 2026-08-08
auth.dev.bastion.tech 1 2025-12-10 2025-12-10
api.dev.bastion.tech 1 2026-05-20 2026-05-20
admin-api.dev.bastion.tech 1 2026-05-20 2026-05-20
clerk.dev.bastion.tech 8 2026-05-02 2026-08-28
mdm.dev.bastion.tech 1 2025-12-28 2025-12-28
login.dev.bastion.tech 24 2026-06-11 2026-10-08
mcp.dev.bastion.tech 2 2025-09-15 2026-08-16
artifacts.dev.bastion.tech 21 2026-05-23 2026-09-19
accounts.dev.bastion.tech 8 2026-05-08 2026-09-03
test.dev.bastion.tech 10 2026-05-10 2026-09-05
trust.dev.bastion.tech 3 2026-06-22 2026-08-21
aiproxy.dev.bastion.tech 2 2026-03-07 2026-08-07
www.bastion.tech 2 2026-01-14 2026-01-14
recovery.bastion.tech 19 2026-02-18 2026-08-25
dnsfiltering-alb.recovery.bastion.tech 1 2026-02-20 2026-02-20
dnsserver-alb.recovery.bastion.tech 1 2026-02-19 2026-02-19
api.recovery.bastion.tech 1 2026-02-18 2026-02-18
admin-api.recovery.bastion.tech 1 2026-02-20 2026-02-20
mdm.recovery.bastion.tech 1 2026-02-19 2026-02-19
mcp.recovery.bastion.tech 1 2026-02-23 2026-02-23
aiproxy.bastion.tech 2 2026-04-14 2026-09-14

Programmatic access: API GET /v1/hosts/bastion.tech (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/bastion.tech.