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) · 479 ms

HostCertsFirst seenLast seenDNS
amboss.com 4 2025-09-14 2026-08-15 ok
*.amboss.com 4 2025-09-14 2026-08-15 —
mobile-api-de.amboss.com 5 2026-04-29 2026-08-27 ok
chat-de.amboss.com 1 2026-09-10 2026-09-10 ok
ajt-web-app-experiment-de.amboss.com 1 2026-08-27 2026-08-27 ok
sessionlessapide.amboss.com 5 2026-04-30 2026-08-28 ok
nextapide.amboss.com 5 2026-04-30 2026-08-28 ok
live.amboss.com 2 2026-03-03 2026-06-26 ok
blog.amboss.com 12 2026-04-17 2026-08-19 ok
auth.amboss.com 9 2026-06-01 2026-09-27 ok
de.auth.amboss.com 8 2026-04-12 2026-08-09 ok
en.auth.amboss.com 8 2026-04-12 2026-08-10 ok
de.api.amboss.com 5 2026-05-28 2026-09-25 ok
en.api.amboss.com 5 2026-05-28 2026-09-25 ok
discoversocial.amboss.com 11 2026-05-14 2026-09-21 ok
extension.amboss.com 5 2026-04-26 2026-08-24 ok
contentapi21.de.production.amboss.com 10 2026-04-22 2026-09-19 ok
lisa.de.production.amboss.com 5 2026-05-28 2026-09-25 ok
lingua.de.production.amboss.com 5 2026-05-21 2026-09-18 ok
lingua-web.de.production.amboss.com 5 2026-05-25 2026-09-22 ok
llm-qc.de.production.amboss.com 4 2026-04-18 2026-08-16 ok
purchase-service.de.production.amboss.com 6 2026-06-03 2026-10-01 ok
mdm-service.de.production.amboss.com 1 2026-09-14 2026-09-14 ok
product-service.de.production.amboss.com 7 2026-06-03 2026-10-01 ok
sif.de.production.amboss.com 10 2026-05-21 2026-09-23 ok
smough.de.production.amboss.com 5 2026-05-10 2026-09-07 ok
api.de.production.amboss.com 6 2026-05-28 2026-09-25 ok
medicoach-api.de.production.amboss.com 4 2026-04-09 2026-08-07 ok
nextapi.de.production.amboss.com 5 2026-04-30 2026-08-28 ok
email-check.de.production.amboss.com 5 2026-05-29 2026-09-26 ok
ribosom.de.production.amboss.com 6 2026-06-03 2026-10-01 ok
auth-sso.de.production.amboss.com 4 2026-04-12 2026-08-10 ok
course-mcp.de.production.amboss.com 1 2026-09-08 2026-09-08 ok
adaptive-learning-mcp.de.production.amboss.com 6 2026-06-02 2026-09-30 ok
skills-mcp.de.production.amboss.com 5 2026-05-23 2026-09-20 ok
content-mcp.de.production.amboss.com 5 2026-05-24 2026-09-21 ok
sop.de.production.amboss.com 5 2026-04-26 2026-08-24 ok
anki-qbank-mapper.de.production.amboss.com 5 2026-05-10 2026-09-07 ok
ambossador.de.production.amboss.com 29 2026-04-15 2026-09-29 ok
kilo-general-labs.de.production.amboss.com 5 2026-04-28 2026-08-26 ok
search-tools.de.production.amboss.com 5 2026-06-03 2026-10-01 ok
amboss.de.production.amboss.com 5 2026-05-28 2026-09-24 ok
sprx.de.production.amboss.com 9 2026-05-29 2026-10-03 ok
b2b-shared-sso-proxy.de.production.amboss.com 5 2026-04-25 2026-08-23 ok
manus-sif.production.amboss.com 10 2026-05-21 2026-09-23 ok
anki.production.amboss.com 10 2026-06-01 2026-09-30 ok
hydro.production.amboss.com 11 2026-05-14 2026-09-21 ok
contentapi21.us.production.amboss.com 10 2026-04-22 2026-09-25 ok
lisa.us.production.amboss.com 5 2026-05-09 2026-09-06 ok
cme-be.us.production.amboss.com 5 2026-05-28 2026-09-25 ok
purchase-service.us.production.amboss.com 4 2026-04-16 2026-08-14 ok
product-service.us.production.amboss.com 5 2026-04-22 2026-08-20 ok
cme-fe.us.production.amboss.com 5 2026-05-28 2026-09-25 ok
wernicke.us.production.amboss.com 5 2026-05-10 2026-09-07 ok
synapse.us.production.amboss.com 5 2026-05-14 2026-09-11 ok
sif.us.production.amboss.com 10 2026-05-28 2026-09-25 ok
smough.us.production.amboss.com 1 2026-09-03 2026-09-03 ok
anki.us.production.amboss.com 10 2026-06-01 2026-09-30 ok
api.us.production.amboss.com 5 2026-05-28 2026-09-25 ok
medicoach-api.us.production.amboss.com 5 2026-05-28 2026-09-25 ok
nextapi.us.production.amboss.com 5 2026-04-26 2026-08-24 ok
ribosom.us.production.amboss.com 6 2026-06-03 2026-10-01 ok
browser-extension.us.production.amboss.com 5 2026-04-24 2026-08-21 ok
auth-sso.us.production.amboss.com 4 2026-04-09 2026-08-07 ok
zendesk-guide-mcp.us.production.amboss.com 3 2026-06-17 2026-08-16 ok
course-mcp.us.production.amboss.com 3 2026-07-27 2026-09-25 ok
hackathon-2026-patientenbrief-mcp.us.production.amboss.com 3 2026-06-23 2026-08-22 ok
adaptive-learning-mcp.us.production.amboss.com 6 2026-06-02 2026-09-30 ok
content-extraction-mcp.us.production.amboss.com 3 2026-07-08 2026-09-06 ok
anki-qbank-mapper.us.production.amboss.com 6 2026-06-03 2026-10-01 ok
chatgpt-plugin-server.us.production.amboss.com 4 2026-06-05 2026-10-03 ok
emr.us.production.amboss.com 5 2026-05-07 2026-09-04 ok
ambossador.us.production.amboss.com 29 2026-04-15 2026-09-28 ok
search-tools.us.production.amboss.com 5 2026-04-30 2026-08-28 ok
drips.us.production.amboss.com 3 2026-06-25 2026-08-24 ok
amboss.us.production.amboss.com 5 2026-06-01 2026-09-28 ok
sprx.us.production.amboss.com 9 2026-05-29 2026-10-03 ok
content-gateway.us.production.amboss.com 11 2026-04-23 2026-09-30 ok
content-repository.us.production.amboss.com 2 2026-10-01 2026-10-01 ok
search-proxy.us.production.amboss.com 4 2026-04-10 2026-08-08 ok
scfhs-proxy.us.production.amboss.com 5 2026-06-03 2026-10-01 ok
wernicke.eu.production.amboss.com 5 2026-05-10 2026-09-07 ok
synapse.eu.production.amboss.com 5 2026-05-09 2026-09-05 ok
anki.eu.production.amboss.com 10 2026-05-18 2026-09-30 ok
content-gateway.eu.production.amboss.com 10 2026-05-05 2026-09-30 ok
search-proxy.eu.production.amboss.com 5 2026-04-30 2026-08-27 ok
go.amboss.com 5 2026-05-06 2026-09-06 ok
lp.amboss.com 11 2026-05-14 2026-09-21 ok
offer.amboss.com 10 2026-04-17 2026-08-13 ok
clicks.amboss.com 2 2025-09-10 2026-08-11 ok
effigos.amboss.com 5 2026-04-22 2026-08-20 ok
careers.amboss.com 5 2026-05-22 2026-08-11 ok
access.amboss.com 8 2026-04-21 2026-08-18 ok
website-assets.amboss.com 7 2026-03-12 2026-08-13 ok
insights.amboss.com 9 2026-04-10 2026-09-28 ok
events.amboss.com 4 2026-06-08 2026-10-06 ok
mta-sts.amboss.com 7 2026-05-23 2026-09-22 ok
mobile-api-us.amboss.com 5 2026-04-29 2026-08-27 ok
ajt-web-app-experiment-us.amboss.com 1 2026-08-27 2026-08-27 ok
billing.us.amboss.com 2 2026-09-29 2026-09-29 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/amboss.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/amboss.com.