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.

100 hosts (first page) · 525 ms

HostCertsFirst seenLast seenDNS
au.com 3 2025-08-26 2026-09-02 ok
*.au.com 7 2025-08-04 2026-09-02 —
my-00.au.com 2 2025-07-01 2026-07-01 ok
api-my-00.au.com 1 2026-05-26 2026-05-26 ok
stg.api-my-00.au.com 1 2026-07-01 2026-07-01 ok
cdn.my-00.au.com 2 2025-08-01 2026-07-02 ok
my-01.au.com 2 2025-10-08 2026-09-08 ok
api-my-01.au.com 1 2026-05-26 2026-05-26 ok
imap01.au.com 1 2026-03-03 2026-03-03 ok
smtp01.au.com 1 2026-03-03 2026-03-03 ok
my-02.au.com 2 2025-10-08 2026-09-08 ok
api-my-02.au.com 1 2026-05-26 2026-05-26 ok
imap02.au.com 1 2026-03-03 2026-03-03 ok
smtp02.au.com 1 2026-03-03 2026-03-03 ok
my-03.au.com 1 2026-05-01 2026-05-01 ok
api-my-03.au.com 1 2026-05-26 2026-05-26 ok
api-my-04.au.com 1 2026-05-26 2026-05-26 ok
uqmobile-order-a.au.com 2 2025-07-05 2026-06-05 ok
api.uqmobile-order-a.au.com 2 2025-07-05 2026-06-05 ok
cdn-order-a.au.com 2 2025-07-20 2026-06-20 ok
ols-order-a.au.com 2 2025-07-07 2026-06-07 ok
api.ols-order-a.au.com 2 2025-07-05 2026-06-05 ok
ols-order-front-a.au.com 1 2026-01-30 2026-01-30 ok
online-yoyaku-test-a.au.com 1 2026-01-29 2026-01-29 ok
lopota.au.com 3 2025-07-08 2026-06-08 ok
stg-lopota.au.com 4 2025-09-29 2026-08-30 ok
*.stg-lopota.au.com 4 2025-09-29 2026-08-30 —
dev-lopota.au.com 3 2025-07-08 2026-06-08 ok
*.dev-lopota.au.com 3 2025-07-08 2026-06-08 —
temp-ols-test-admin.dev-lopota.au.com 1 2026-03-16 2026-03-16 nodata
temp-ols-test.dev-lopota.au.com 1 2026-03-03 2026-03-03 nodata
*.lopota.au.com 3 2025-07-08 2026-06-08 —
uqmobile-order-b.au.com 2 2025-07-05 2026-06-05 ok
api.uqmobile-order-b.au.com 2 2025-07-05 2026-06-05 ok
cdn-order-b.au.com 2 2025-07-20 2026-06-20 ok
ols-order-b.au.com 2 2025-07-07 2026-06-07 ok
api.ols-order-b.au.com 2 2025-07-05 2026-06-05 ok
online-yoyaku-test-b.au.com 1 2026-01-29 2026-01-29 ok
cdn-online-yoyaku-b.au.com 2 2025-07-20 2026-06-20 ok
kidslab.au.com 2 2025-09-16 2026-08-17 ok
stg.kidslab.au.com 2 2025-09-11 2026-08-12 ok
dev.kidslab.au.com 2 2025-09-10 2026-08-11 ok
uqmobile-order-c.au.com 2 2025-07-05 2026-06-05 ok
api.uqmobile-order-c.au.com 2 2025-07-05 2026-06-05 ok
cdn-order-c.au.com 2 2025-07-20 2026-06-20 ok
ols-order-c.au.com 2 2025-07-07 2026-06-07 ok
api.ols-order-c.au.com 2 2025-07-05 2026-06-05 ok
online-yoyaku-test-c.au.com 1 2026-01-29 2026-01-29 ok
cdn-online-yoyaku-c.au.com 2 2025-07-19 2026-06-19 ok
anshinsec.au.com 1 2026-01-30 2026-01-30 nodata
*.anshinsec.au.com 1 2026-01-30 2026-01-30 —
uqmobile-order-d.au.com 2 2025-07-05 2026-06-05 ok
api.uqmobile-order-d.au.com 2 2025-07-05 2026-06-05 ok
cdn-order-d.au.com 2 2025-07-20 2026-06-20 ok
ols-order-d.au.com 2 2025-07-07 2026-06-07 ok
api.ols-order-d.au.com 2 2025-07-05 2026-06-05 ok
cdn-online-yoyaku-d.au.com 2 2025-07-19 2026-06-19 ok
uqmobile-order-e.au.com 2 2025-07-05 2026-06-05 ok
api.uqmobile-order-e.au.com 2 2025-07-05 2026-06-05 ok
cdn-order-e.au.com 2 2025-07-20 2026-06-20 ok
ols-order-e.au.com 2 2025-07-07 2026-06-07 ok
api.ols-order-e.au.com 2 2025-07-05 2026-06-05 ok
cdn-online-yoyaku-e.au.com 2 2025-07-19 2026-06-19 ok
voice.au.com 1 2025-10-16 2025-10-16 ok
data-oazukari-invoice.au.com 2 2025-07-24 2026-07-28 ok
prd-data-oazukari-invoice.au.com 1 2026-07-15 2026-07-15 ok
aumail-portability-invoice.au.com 2 2025-07-24 2026-07-28 ok
prd-aumail-portability-invoice.au.com 1 2026-07-15 2026-07-15 ok
operation-note.k3.engage.au.com 1 2025-11-27 2025-11-27 nodata
live-blue.k3.engage.au.com 2 2025-07-07 2026-06-05 ok
live.k3.engage.au.com 2 2025-07-07 2026-06-05 ok
operation.k3.engage.au.com 2 2025-07-07 2026-06-05 ok
fibo.k3.engage.au.com 2 2026-03-05 2026-07-21 ok
demo.k3.engage.au.com 2 2025-07-09 2026-06-08 nodata
gibbs.k3.engage.au.com 1 2025-11-22 2025-11-22 ok
assets.k3.engage.au.com 2 2025-07-09 2026-06-08 nodata
live-blue.engage.au.com 2 2025-07-07 2026-06-05 ok
live.engage.au.com 2 2025-07-07 2026-06-05 ok
fibo.engage.au.com 2 2026-03-18 2026-08-18 ok
demo.engage.au.com 2 2025-07-09 2026-06-08 nodata
gibbs.engage.au.com 1 2025-11-22 2025-11-22 ok
assets.engage.au.com 2 2025-07-09 2026-06-08 nodata
assets.line.cocoa.dev.engage.au.com 1 2026-01-28 2026-01-28 ok
live-blue.dev.engage.au.com 2 2025-07-04 2026-06-02 ok
live.dev.engage.au.com 2 2025-07-04 2026-06-02 ok
mock.dev.engage.au.com 2 2025-07-04 2026-06-02 ok
line-social-api-mock.dev.engage.au.com 1 2025-11-20 2025-11-20 ok
operation.dev.engage.au.com 2 2025-07-04 2026-06-02 ok
fibo.dev.engage.au.com 1 2026-01-14 2026-01-14 ok
gibbs.dev.engage.au.com 1 2025-11-22 2025-11-22 ok
maintenance.k1.chat-message.au.com 3 2026-05-04 2026-10-04 ok
engage.k1.chat-message.au.com 2 2025-06-13 2026-05-13 ok
ep-ctc-engage.k1.chat-message.au.com 2 2026-01-29 2026-02-03 ok
web-message.k1.chat-message.au.com 1 2025-12-01 2025-12-01 ok
widget-generative-ai.k1.chat-message.au.com 1 2025-12-07 2025-12-07 ok
api.k1.chat-message.au.com 15 2026-08-26 2026-10-02 ok
widget-admin-api.k1.chat-message.au.com 3 2026-04-19 2026-09-19 ok
widget-image-admin.k1.chat-message.au.com 3 2026-04-18 2026-09-18 ok
widget-admin.k1.chat-message.au.com 3 2026-04-19 2026-09-19 ok
information.k1.chat-message.au.com 1 2026-01-11 2026-01-11 ok

Showing the first 100 hostnames — sign in with GitHub or Google to page the full list, or use the API with an API key: GET /v1/hosts/au.com.

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/au.com.